B Cell Lymphoma

Key clinical point: The outcomes of autologous stem cell transplantation (ASCT) are not superior to those of anti-CD20 radioimmunotherapy, which offers a less toxic consolidation approach, in patients with relapsed or refractory (R/R) follicular lymphoma (FL) receiving rituximab-based induction and maintenance.

Major finding: At a 77-month median follow-up, both treatment groups had estimated 3-year progression-free survival rates of 62% (hazard ratio [HR] 1.11; P  =  .6662) and similar 3-year overall survival (HR 0.94; P  =  .8588). ASCT vs radioimmunotherapy led to higher rates of grade ≥ 3 hematological toxicity and grade ≥ 3 neutropenia (both P < .001).

Study details: This phase 3 FLAZ12 trial included 159 patients with R/R FL after ≤2 chemotherapy lines (≥1 lines containing rituximab) who received rituximab-based induction chemoimmunotherapy, with those showing a partial or complete response being randomized 1:1 to receive ASCT or radioimmunotherapy, both followed by rituximab maintenance.

Disclosures: This study was funded by the Agenzia Italiana del Farmaco (AIFA) and Fondazione Italiana Linfomi. Some authors declared receiving honoraria or research funding from AIFA and others.

Source: Ladetto M, Tavarozzi  R, et al. Radioimmunotherapy versus autologous hematopoietic stem cell transplantation in relapse/refractory follicular lymphoma: A Fondazione Italiana Linfomi multicenter, randomized, phase 3 trial. Ann Oncol. 2023 (Nov 1). doi: 10.1016/j.annonc.2023.10.095

Key clinical point: The outcomes of autologous stem cell transplantation (ASCT) are not superior to those of anti-CD20 radioimmunotherapy, which offers a less toxic consolidation approach, in patients with relapsed or refractory (R/R) follicular lymphoma (FL) receiving rituximab-based induction and maintenance.

Major finding: At a 77-month median follow-up, both treatment groups had estimated 3-year progression-free survival rates of 62% (hazard ratio [HR] 1.11; P  =  .6662) and similar 3-year overall survival (HR 0.94; P  =  .8588). ASCT vs radioimmunotherapy led to higher rates of grade ≥ 3 hematological toxicity and grade ≥ 3 neutropenia (both P < .001).

Study details: This phase 3 FLAZ12 trial included 159 patients with R/R FL after ≤2 chemotherapy lines (≥1 lines containing rituximab) who received rituximab-based induction chemoimmunotherapy, with those showing a partial or complete response being randomized 1:1 to receive ASCT or radioimmunotherapy, both followed by rituximab maintenance.

Disclosures: This study was funded by the Agenzia Italiana del Farmaco (AIFA) and Fondazione Italiana Linfomi. Some authors declared receiving honoraria or research funding from AIFA and others.

Source: Ladetto M, Tavarozzi  R, et al. Radioimmunotherapy versus autologous hematopoietic stem cell transplantation in relapse/refractory follicular lymphoma: A Fondazione Italiana Linfomi multicenter, randomized, phase 3 trial. Ann Oncol. 2023 (Nov 1). doi: 10.1016/j.annonc.2023.10.095

Key clinical point: The outcomes of autologous stem cell transplantation (ASCT) are not superior to those of anti-CD20 radioimmunotherapy, which offers a less toxic consolidation approach, in patients with relapsed or refractory (R/R) follicular lymphoma (FL) receiving rituximab-based induction and maintenance.

Major finding: At a 77-month median follow-up, both treatment groups had estimated 3-year progression-free survival rates of 62% (hazard ratio [HR] 1.11; P  =  .6662) and similar 3-year overall survival (HR 0.94; P  =  .8588). ASCT vs radioimmunotherapy led to higher rates of grade ≥ 3 hematological toxicity and grade ≥ 3 neutropenia (both P < .001).

Study details: This phase 3 FLAZ12 trial included 159 patients with R/R FL after ≤2 chemotherapy lines (≥1 lines containing rituximab) who received rituximab-based induction chemoimmunotherapy, with those showing a partial or complete response being randomized 1:1 to receive ASCT or radioimmunotherapy, both followed by rituximab maintenance.

Disclosures: This study was funded by the Agenzia Italiana del Farmaco (AIFA) and Fondazione Italiana Linfomi. Some authors declared receiving honoraria or research funding from AIFA and others.

Source: Ladetto M, Tavarozzi  R, et al. Radioimmunotherapy versus autologous hematopoietic stem cell transplantation in relapse/refractory follicular lymphoma: A Fondazione Italiana Linfomi multicenter, randomized, phase 3 trial. Ann Oncol. 2023 (Nov 1). doi: 10.1016/j.annonc.2023.10.095

Key clinical point: TP53 mutations detected by clinical laboratory mutation analysis (CLMA) can independently predict poor outcomes in patients with newly diagnosed diffuse large B cell lymphoma (DLBCL) or high-grade B cell lymphoma (HGBL) treated with first-line immunochemotherapy.

Major finding: TP53 mutations significantly predicted disease progression at 2 years (adjusted hazard ratio 2.3; P  =  .03). Patients with vs without TP53 mutations had significantly lower overall response (71% vs 90%; P  =  .009), complete response (55% vs 77%, P  =  .01), estimated 2-year progression-free survival (57% vs 77%; P  =  .006), and estimated 2-year overall survival (70% vs 91%; P  =  .001) rates.

Study details: This study included 122 patients with newly diagnosed DLBCL or HGBL receiving first-line immunochemotherapy whose diagnostic biopsies underwent CLMA, of whom 42 patients had TP53 mutations.

Disclosures: This study did not disclose any funding source. All authors, except A Bagg, declared receiving honoraria, travel grants, or research funding from or having other ties with various sources.

Source: Landsburg DJ et al. TP53 mutations predict for poor outcomes in patients with newly-diagnosed aggressive B cell lymphomas in the current era. Blood Adv. 2023 (Oct 18). doi: 10.1182/bloodadvances.2023011384

Key clinical point: TP53 mutations detected by clinical laboratory mutation analysis (CLMA) can independently predict poor outcomes in patients with newly diagnosed diffuse large B cell lymphoma (DLBCL) or high-grade B cell lymphoma (HGBL) treated with first-line immunochemotherapy.

Major finding: TP53 mutations significantly predicted disease progression at 2 years (adjusted hazard ratio 2.3; P  =  .03). Patients with vs without TP53 mutations had significantly lower overall response (71% vs 90%; P  =  .009), complete response (55% vs 77%, P  =  .01), estimated 2-year progression-free survival (57% vs 77%; P  =  .006), and estimated 2-year overall survival (70% vs 91%; P  =  .001) rates.

Study details: This study included 122 patients with newly diagnosed DLBCL or HGBL receiving first-line immunochemotherapy whose diagnostic biopsies underwent CLMA, of whom 42 patients had TP53 mutations.

Disclosures: This study did not disclose any funding source. All authors, except A Bagg, declared receiving honoraria, travel grants, or research funding from or having other ties with various sources.

Source: Landsburg DJ et al. TP53 mutations predict for poor outcomes in patients with newly-diagnosed aggressive B cell lymphomas in the current era. Blood Adv. 2023 (Oct 18). doi: 10.1182/bloodadvances.2023011384

Key clinical point: TP53 mutations detected by clinical laboratory mutation analysis (CLMA) can independently predict poor outcomes in patients with newly diagnosed diffuse large B cell lymphoma (DLBCL) or high-grade B cell lymphoma (HGBL) treated with first-line immunochemotherapy.

Major finding: TP53 mutations significantly predicted disease progression at 2 years (adjusted hazard ratio 2.3; P  =  .03). Patients with vs without TP53 mutations had significantly lower overall response (71% vs 90%; P  =  .009), complete response (55% vs 77%, P  =  .01), estimated 2-year progression-free survival (57% vs 77%; P  =  .006), and estimated 2-year overall survival (70% vs 91%; P  =  .001) rates.

Study details: This study included 122 patients with newly diagnosed DLBCL or HGBL receiving first-line immunochemotherapy whose diagnostic biopsies underwent CLMA, of whom 42 patients had TP53 mutations.

Disclosures: This study did not disclose any funding source. All authors, except A Bagg, declared receiving honoraria, travel grants, or research funding from or having other ties with various sources.

Source: Landsburg DJ et al. TP53 mutations predict for poor outcomes in patients with newly-diagnosed aggressive B cell lymphomas in the current era. Blood Adv. 2023 (Oct 18). doi: 10.1182/bloodadvances.2023011384

Key clinical point: Allogeneic hematopoietic stem cell transplantation (allo-HSCT) led to acceptable survival outcomes in patients with relapsed or refractory diffuse large B cell lymphoma (DLBCL), particularly in those achieving a partial or complete response to chemotherapy before allo-HSCT.

Major finding: At a median follow-up of 38.3 months, the estimated 5-year overall survival and event-free survival rates were 38.4% (95% CI 24.7%-51.8%) and 30.6% (95% CI 18.8%-43.3%), respectively, with patients who achieved a partial or complete response before allo-HSCT having overall survival and event-free survival rates of 54.1% (95% CI 34.2%-70.3%) and 46.4% (95% CI 28.1%-62.9%), respectively.

Study details: This retrospective study included 52 adult patients with relapsed or refractory DLBCL who either had an active disease status or achieved a partial or complete response before transplantation and underwent allo-HSCT.

Disclosures: This study did not disclose any funding source. The authors declared no conflicts of interest.

Source: Min GJ et al. The salvage role of allogeneic hematopoietic stem-cell transplantation in relapsed/refractory diffuse large B cell lymphoma. Sci Rep. 2023;13:17496 (Oct 15). doi: 10.1038/s41598-023-44241-0

Key clinical point: Allogeneic hematopoietic stem cell transplantation (allo-HSCT) led to acceptable survival outcomes in patients with relapsed or refractory diffuse large B cell lymphoma (DLBCL), particularly in those achieving a partial or complete response to chemotherapy before allo-HSCT.

Major finding: At a median follow-up of 38.3 months, the estimated 5-year overall survival and event-free survival rates were 38.4% (95% CI 24.7%-51.8%) and 30.6% (95% CI 18.8%-43.3%), respectively, with patients who achieved a partial or complete response before allo-HSCT having overall survival and event-free survival rates of 54.1% (95% CI 34.2%-70.3%) and 46.4% (95% CI 28.1%-62.9%), respectively.

Study details: This retrospective study included 52 adult patients with relapsed or refractory DLBCL who either had an active disease status or achieved a partial or complete response before transplantation and underwent allo-HSCT.

Disclosures: This study did not disclose any funding source. The authors declared no conflicts of interest.

Source: Min GJ et al. The salvage role of allogeneic hematopoietic stem-cell transplantation in relapsed/refractory diffuse large B cell lymphoma. Sci Rep. 2023;13:17496 (Oct 15). doi: 10.1038/s41598-023-44241-0

Key clinical point: Allogeneic hematopoietic stem cell transplantation (allo-HSCT) led to acceptable survival outcomes in patients with relapsed or refractory diffuse large B cell lymphoma (DLBCL), particularly in those achieving a partial or complete response to chemotherapy before allo-HSCT.

Major finding: At a median follow-up of 38.3 months, the estimated 5-year overall survival and event-free survival rates were 38.4% (95% CI 24.7%-51.8%) and 30.6% (95% CI 18.8%-43.3%), respectively, with patients who achieved a partial or complete response before allo-HSCT having overall survival and event-free survival rates of 54.1% (95% CI 34.2%-70.3%) and 46.4% (95% CI 28.1%-62.9%), respectively.

Study details: This retrospective study included 52 adult patients with relapsed or refractory DLBCL who either had an active disease status or achieved a partial or complete response before transplantation and underwent allo-HSCT.

Disclosures: This study did not disclose any funding source. The authors declared no conflicts of interest.

Source: Min GJ et al. The salvage role of allogeneic hematopoietic stem-cell transplantation in relapsed/refractory diffuse large B cell lymphoma. Sci Rep. 2023;13:17496 (Oct 15). doi: 10.1038/s41598-023-44241-0

Key clinical point: Fixed-duration ibrutinib-venetoclax vs chlorambucil-obinutuzumab continues to extend progression-free survival and leads to overall survival advantage at a 4-year follow-up in patients with previously untreated chronic lymphocytic leukemia (CLL).

Major finding: At a median follow-up of 46 months, the ibrutinib-venetoclax vs chlorambucil-obinutuzumab group continued to show better progression-free survival (hazard ratio [HR] 0.214; P < .0001) while also demonstrating overall survival benefit (HR 0.487; P  =  .021). One treatment-related death was reported in each group.

Study details: Findings are from a 4-year follow-up of the phase 3 GLOW trial including 211 patients with previously untreated CLL who were randomly assigned to receive ibrutinib-venetoclax or chlorambucil-obinutuzumab.

Disclosures: This study was funded by Janssen Research & Development and Pharmacyclics. Several authors declared serving on the boards of directors or advisory committees of or receiving consultancy fees, research funding, or honoraria from various sources, including Janssen. Nine authors declared being employees or equity holders of Janssen.

Source: Niemann CU et al. Fixed-duration ibrutinib–venetoclax versus chlorambucil–obinutuzumab in previously untreated chronic lymphocytic leukaemia (GLOW): 4-Year follow-up from a multicentre, open-label, randomised, phase 3 trial. Lancet Oncol. 2023 (Nov 6). doi: 10.1016/S1470-2045(23)00452-7

Key clinical point: Fixed-duration ibrutinib-venetoclax vs chlorambucil-obinutuzumab continues to extend progression-free survival and leads to overall survival advantage at a 4-year follow-up in patients with previously untreated chronic lymphocytic leukemia (CLL).

Major finding: At a median follow-up of 46 months, the ibrutinib-venetoclax vs chlorambucil-obinutuzumab group continued to show better progression-free survival (hazard ratio [HR] 0.214; P < .0001) while also demonstrating overall survival benefit (HR 0.487; P  =  .021). One treatment-related death was reported in each group.

Study details: Findings are from a 4-year follow-up of the phase 3 GLOW trial including 211 patients with previously untreated CLL who were randomly assigned to receive ibrutinib-venetoclax or chlorambucil-obinutuzumab.

Disclosures: This study was funded by Janssen Research & Development and Pharmacyclics. Several authors declared serving on the boards of directors or advisory committees of or receiving consultancy fees, research funding, or honoraria from various sources, including Janssen. Nine authors declared being employees or equity holders of Janssen.

Source: Niemann CU et al. Fixed-duration ibrutinib–venetoclax versus chlorambucil–obinutuzumab in previously untreated chronic lymphocytic leukaemia (GLOW): 4-Year follow-up from a multicentre, open-label, randomised, phase 3 trial. Lancet Oncol. 2023 (Nov 6). doi: 10.1016/S1470-2045(23)00452-7

Key clinical point: Fixed-duration ibrutinib-venetoclax vs chlorambucil-obinutuzumab continues to extend progression-free survival and leads to overall survival advantage at a 4-year follow-up in patients with previously untreated chronic lymphocytic leukemia (CLL).

Major finding: At a median follow-up of 46 months, the ibrutinib-venetoclax vs chlorambucil-obinutuzumab group continued to show better progression-free survival (hazard ratio [HR] 0.214; P < .0001) while also demonstrating overall survival benefit (HR 0.487; P  =  .021). One treatment-related death was reported in each group.

Study details: Findings are from a 4-year follow-up of the phase 3 GLOW trial including 211 patients with previously untreated CLL who were randomly assigned to receive ibrutinib-venetoclax or chlorambucil-obinutuzumab.

Disclosures: This study was funded by Janssen Research & Development and Pharmacyclics. Several authors declared serving on the boards of directors or advisory committees of or receiving consultancy fees, research funding, or honoraria from various sources, including Janssen. Nine authors declared being employees or equity holders of Janssen.

Source: Niemann CU et al. Fixed-duration ibrutinib–venetoclax versus chlorambucil–obinutuzumab in previously untreated chronic lymphocytic leukaemia (GLOW): 4-Year follow-up from a multicentre, open-label, randomised, phase 3 trial. Lancet Oncol. 2023 (Nov 6). doi: 10.1016/S1470-2045(23)00452-7

Key clinical point: Brexucabtagene autoleucel (brexu-cel) provides survival benefit over non-chimeric antigen receptor (CAR) T-cell standard of care (SOC) in patients with relapsed or refractory mantle cell lymphoma (MCL) treated with covalent Bruton tyrosine kinase inhibitors (BTKi).

Major finding: Inverse probability weighting showed that brexu-cel vs SOC led to a significantly reduced risk for death (adjusted hazard ratio 0.38; P < .001), with the findings being similar for other adjusted comparisons.

Study details: This indirect comparison study analyzed the individual patient data of BTKi-treated patients with relapsed or refractory MCL who received brexu-cel in ZUMA-2 (n = 68) and non-CAR T-cell SOC in SCHOLAR-2 (n = 149).

Disclosures: This study was sponsored by Kite, a Gilead Company. Some authors declared participating in the data safety monitoring or advisory boards of or receiving grants, consulting fees, travel support, or honoraria for lectures, etc., from Kite, Gilead, and others. Five authors declared being employees or stockowners of Kite, Gilead, or PRECISIONheor.

Source: Hess G et al. Indirect treatment comparison of brexucabtagene autoleucel (ZUMA-2) versus standard of care (SCHOLAR-2) in relapsed/refractory mantle cell lymphoma. Leuk Lymphoma. 2023 (Oct 16). doi: 10.1080/10428194.2023.2268228

Key clinical point: Brexucabtagene autoleucel (brexu-cel) provides survival benefit over non-chimeric antigen receptor (CAR) T-cell standard of care (SOC) in patients with relapsed or refractory mantle cell lymphoma (MCL) treated with covalent Bruton tyrosine kinase inhibitors (BTKi).

Major finding: Inverse probability weighting showed that brexu-cel vs SOC led to a significantly reduced risk for death (adjusted hazard ratio 0.38; P < .001), with the findings being similar for other adjusted comparisons.

Study details: This indirect comparison study analyzed the individual patient data of BTKi-treated patients with relapsed or refractory MCL who received brexu-cel in ZUMA-2 (n = 68) and non-CAR T-cell SOC in SCHOLAR-2 (n = 149).

Disclosures: This study was sponsored by Kite, a Gilead Company. Some authors declared participating in the data safety monitoring or advisory boards of or receiving grants, consulting fees, travel support, or honoraria for lectures, etc., from Kite, Gilead, and others. Five authors declared being employees or stockowners of Kite, Gilead, or PRECISIONheor.

Source: Hess G et al. Indirect treatment comparison of brexucabtagene autoleucel (ZUMA-2) versus standard of care (SCHOLAR-2) in relapsed/refractory mantle cell lymphoma. Leuk Lymphoma. 2023 (Oct 16). doi: 10.1080/10428194.2023.2268228

Key clinical point: Brexucabtagene autoleucel (brexu-cel) provides survival benefit over non-chimeric antigen receptor (CAR) T-cell standard of care (SOC) in patients with relapsed or refractory mantle cell lymphoma (MCL) treated with covalent Bruton tyrosine kinase inhibitors (BTKi).

Major finding: Inverse probability weighting showed that brexu-cel vs SOC led to a significantly reduced risk for death (adjusted hazard ratio 0.38; P < .001), with the findings being similar for other adjusted comparisons.

Study details: This indirect comparison study analyzed the individual patient data of BTKi-treated patients with relapsed or refractory MCL who received brexu-cel in ZUMA-2 (n = 68) and non-CAR T-cell SOC in SCHOLAR-2 (n = 149).

Disclosures: This study was sponsored by Kite, a Gilead Company. Some authors declared participating in the data safety monitoring or advisory boards of or receiving grants, consulting fees, travel support, or honoraria for lectures, etc., from Kite, Gilead, and others. Five authors declared being employees or stockowners of Kite, Gilead, or PRECISIONheor.

Source: Hess G et al. Indirect treatment comparison of brexucabtagene autoleucel (ZUMA-2) versus standard of care (SCHOLAR-2) in relapsed/refractory mantle cell lymphoma. Leuk Lymphoma. 2023 (Oct 16). doi: 10.1080/10428194.2023.2268228

Key clinical point: Patients with relapsed or refractory large B-cell lymphoma (LBCL) who were recently exposed to preapheresis bendamustine showed negative treatment outcomes, hematologic toxicity, and severe infections after CD19-targeted chimeric antigen receptor (CAR) T-cell therapy.

Major finding: Patients recently exposed to bendamustine (<9 months) vs those naive to it before apheresis had a significantly lower overall response rate (40% vs 66%; P  =  .01) and shorter overall survival (adjusted hazard ratio [aHR] 2.11; P < .01) and progression-free survival (aHR 1.82; P < .01) after CAR T-cell infusion.

Study details: This retrospective multicenter study included 439 patients with relapsed or refractory LBCL who received CD19-targeted commercial CAR T-cell therapy after ≥2 prior treatment lines, of whom 80 patients had received bendamustine before apheresis.

Disclosures: This study was supported by the Carlos III Health Institute, Spain, and others. Some authors declared serving in consulting or advisory roles for or as members of speakers’ bureaus of or receiving honoraria, research funding, or travel or accommodation expenses from various sources.

Source: Iacoboni G et al. Recent bendamustine treatment before apheresis has a negative impact on outcomes in patients with large B-cell lymphoma receiving chimeric antigen receptor T-cell therapy. J Clin Oncol. 2023 (Oct 24). doi: 10.1200/JCO.23.01097

Key clinical point: Patients with relapsed or refractory large B-cell lymphoma (LBCL) who were recently exposed to preapheresis bendamustine showed negative treatment outcomes, hematologic toxicity, and severe infections after CD19-targeted chimeric antigen receptor (CAR) T-cell therapy.

Major finding: Patients recently exposed to bendamustine (<9 months) vs those naive to it before apheresis had a significantly lower overall response rate (40% vs 66%; P  =  .01) and shorter overall survival (adjusted hazard ratio [aHR] 2.11; P < .01) and progression-free survival (aHR 1.82; P < .01) after CAR T-cell infusion.

Study details: This retrospective multicenter study included 439 patients with relapsed or refractory LBCL who received CD19-targeted commercial CAR T-cell therapy after ≥2 prior treatment lines, of whom 80 patients had received bendamustine before apheresis.

Disclosures: This study was supported by the Carlos III Health Institute, Spain, and others. Some authors declared serving in consulting or advisory roles for or as members of speakers’ bureaus of or receiving honoraria, research funding, or travel or accommodation expenses from various sources.

Source: Iacoboni G et al. Recent bendamustine treatment before apheresis has a negative impact on outcomes in patients with large B-cell lymphoma receiving chimeric antigen receptor T-cell therapy. J Clin Oncol. 2023 (Oct 24). doi: 10.1200/JCO.23.01097

Key clinical point: Patients with relapsed or refractory large B-cell lymphoma (LBCL) who were recently exposed to preapheresis bendamustine showed negative treatment outcomes, hematologic toxicity, and severe infections after CD19-targeted chimeric antigen receptor (CAR) T-cell therapy.

Major finding: Patients recently exposed to bendamustine (<9 months) vs those naive to it before apheresis had a significantly lower overall response rate (40% vs 66%; P  =  .01) and shorter overall survival (adjusted hazard ratio [aHR] 2.11; P < .01) and progression-free survival (aHR 1.82; P < .01) after CAR T-cell infusion.

Study details: This retrospective multicenter study included 439 patients with relapsed or refractory LBCL who received CD19-targeted commercial CAR T-cell therapy after ≥2 prior treatment lines, of whom 80 patients had received bendamustine before apheresis.

Disclosures: This study was supported by the Carlos III Health Institute, Spain, and others. Some authors declared serving in consulting or advisory roles for or as members of speakers’ bureaus of or receiving honoraria, research funding, or travel or accommodation expenses from various sources.

Source: Iacoboni G et al. Recent bendamustine treatment before apheresis has a negative impact on outcomes in patients with large B-cell lymphoma receiving chimeric antigen receptor T-cell therapy. J Clin Oncol. 2023 (Oct 24). doi: 10.1200/JCO.23.01097

The ZUMA-7 and TRANSFORM studies have been practice-changing for the treatment of relapsed/refractory (R/R) large B-cell lymphoma (LBCL). These studies demonstrated an improvement in outcomes with axicabtagene ciloleucel (axi-cel) and lisocabtagene maraleucel (liso-cel), respectively, as compared with standard-of-care treatment (chemotherapy and autologous stem cell transplantation).^1,2 Patients included in these studies were refractory to their initial therapy or experienced relapse within 12 months and were considered fit for autologous stem cell transplant. It has remained unclear, however, whether patients who are not transplant candidates may also derive benefit and tolerate treatment with chimeric antigen receptor (CAR) T-cell therapy. The PILOT study was a single-arm phase 2 study that demonstrated favorable outcomes with liso-cel in this patient population, thus resulting in the approval of liso-cel by the US Food and Drug Administration for this population.³ Recently, the ALYCATE study similarly examined outcomes in transplant-ineligible patients treated with axi-cel (Houot et al). This phase 2 study included 62 patients with high-risk R/R LBCL who underwent leukapheresis and subsequently received second-line axi-cel. The complete metabolic response rate 3 months after axi-cel infusion was 71.0% (95% CI 58.1%-81.8%). At a median 12-month follow-up, the median progression-free survival was 11.8 months (95% CI 8.4-not reached) whereas median overall survival was not reached. Grade ≥ 3 cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity syndrome (ICANS) occurred in 8.1% and 14.5% of patients, respectively. Also of note, patients age ≥ 70 years did not show increased toxicity compared with those age < 70 years, with similar rates of CRS, ICANS, and intensive care unit transfer. This study supports the role of axi-cel in the second-line setting, regardless of transplant eligibility.

Another important study recently published for patients with LBCL examined the role of central nervous system (CNS) prophylaxis (Lewis et al). We know that certain patients with LBCL, including those with a high CNS international prognostic index (IPI) score, double-hit lymphoma, or disease involvement of multiple or certain extranodal sites (ie, breast, testes, adrenals, kidney) can be at increased risk for lymphoma spread to the CNS.⁴ Strategies to reduce this risk have subsequently been developed for these high-risk patients, though consensus regarding who should be treated and how best to treat patients has been consistent. Recently, retrospective data have also called into question whether our current approaches meaningfully reduce this risk. One such study was a multicenter, international, retrospective observational study that included 2418 adults with aggressive LBCL and a high risk for CNS progression who were treated with curative-intent anti-CD20–based chemoimmunotherapy and who did or did not receive high-dose methotrexate (HD-MTX). Patients who did vs did not receive HD-MTX had a significantly lower risk for CNS progression (adjusted 5-year risk difference 1.6%; adjusted hazard ratio [aHR] 0.59; P = .014), but the significance was lost when considering only those patients who achieved a complete response at chemoimmunotherapy completion (adjusted 5-year risk difference 1.4%; aHR 0.74; P = .30). The study was not sufficiently powered to make definitive conclusions for individual risk groups, though there was no obvious reduction in CNS involvement risk in any high-risk subgroup. With an absolute risk reduction of 1.6% with the use of HD-MTX, 63 patients would require treatment to prevent one CNS progression event over 5 years (Lewis et al). Given the absence of prospective, randomized data, these results, though retrospective in nature, call into question the benefit of CNS prophylaxis. The authors suggest that studies evaluating alternative strategies for prophylaxis and tools for early detection of relapse, such as circulating tumor DNA, may be helpful.

Another study worth noting was one exploring Bruton tyrosine kinase (BTK) inhibition in mantle cell lymphoma (MCL). BTK inhibitors, including zanubrutinib, have emerged as effective therapies for patients with R/R disease. A recent pooled analysis included 112 patients from the BGB-3111-AU-003 and BGB-3111-206 clinical trials who had R/R MCL and received second-line (n = 41) or later-line (n = 71) zanubrutinib (Song et al). At a median follow-up of 35.2 months, patients receiving second-line vs later-line zanubrutinib had significantly improved median overall survival (aHR 0.459; P = .044) and numerically longer median progression-free survival (27.8 vs 22.1 months). Adverse events observed in both groups were consistent with the known safety profile of zanubrutinib. These findings were in line with a prior similar pooled study that demonstrated improved outcomes with second-line ibrutinib for patients with MCL as compared with later-line ibrutinib therapy.⁵ This study, however, did not evaluate the impact on CAR T–cell therapy in MCL, which is also an effective treatment option for patients with R/R disease, and how best to sequence with BTK inhibitors.

Additional References

1.       Locke FL, Miklos DB, Jacobson CA, et al, for All ZUMA-7 Investigators and Contributing Kite Members. Axicabtagene ciloleucel as second-line therapy for large B-cell lymphoma. N Engl J Med. 2022;386:640-654. doi: 10.1056/NEJMoa2116133

2.       Kamdar M, Solomon SR, Arnason J, et al, for theTRANSFORM Investigators. Lisocabtagene maraleucel versus standard of care with salvage chemotherapy followed by autologous stem cell transplantation as second-line treatment in patients with relapsed or refractory large B-cell lymphoma (TRANSFORM): Results from an interim analysis of an open-label, randomised, phase 3 trial. Lancet. 2022;399:2294-2308. doi: 10.1016/S0140-6736(22)00662-6

3.       Gordon LI, Liu FF, Braverman J, et al. Lisocabtagene maraleucel for second-line relapsed or refractory large B-cell lymphoma: Patient-reported outcomes from the PILOT study. Haematologica. 2023 (Aug 31). doi: 10.3324/haematol.2023.283162

4.       Schmitz N, Zeynalova S, Nickelsen M, et al. CNS International Prognostic Index: A risk model for CNS relapse in patients with diffuse large B-cell lymphoma treated with R-CHOP. J Clin Oncol. 2016;34:3150-3156. doi: 10.1200/JCO.2015.65.6520

5.       Dreyling M, Goy A, Hess G, et al. Long-term outcomes with ibrutinib treatment for patients with relapsed/refractory mantle cell lymphoma: A pooled analysis of 3 clinical trials with nearly 10 years of follow-up. Hemasphere. 2022;6:e712. doi: 10.1097/HS9.0000000000000712

The ZUMA-7 and TRANSFORM studies have been practice-changing for the treatment of relapsed/refractory (R/R) large B-cell lymphoma (LBCL). These studies demonstrated an improvement in outcomes with axicabtagene ciloleucel (axi-cel) and lisocabtagene maraleucel (liso-cel), respectively, as compared with standard-of-care treatment (chemotherapy and autologous stem cell transplantation).^1,2 Patients included in these studies were refractory to their initial therapy or experienced relapse within 12 months and were considered fit for autologous stem cell transplant. It has remained unclear, however, whether patients who are not transplant candidates may also derive benefit and tolerate treatment with chimeric antigen receptor (CAR) T-cell therapy. The PILOT study was a single-arm phase 2 study that demonstrated favorable outcomes with liso-cel in this patient population, thus resulting in the approval of liso-cel by the US Food and Drug Administration for this population.³ Recently, the ALYCATE study similarly examined outcomes in transplant-ineligible patients treated with axi-cel (Houot et al). This phase 2 study included 62 patients with high-risk R/R LBCL who underwent leukapheresis and subsequently received second-line axi-cel. The complete metabolic response rate 3 months after axi-cel infusion was 71.0% (95% CI 58.1%-81.8%). At a median 12-month follow-up, the median progression-free survival was 11.8 months (95% CI 8.4-not reached) whereas median overall survival was not reached. Grade ≥ 3 cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity syndrome (ICANS) occurred in 8.1% and 14.5% of patients, respectively. Also of note, patients age ≥ 70 years did not show increased toxicity compared with those age < 70 years, with similar rates of CRS, ICANS, and intensive care unit transfer. This study supports the role of axi-cel in the second-line setting, regardless of transplant eligibility.

Another important study recently published for patients with LBCL examined the role of central nervous system (CNS) prophylaxis (Lewis et al). We know that certain patients with LBCL, including those with a high CNS international prognostic index (IPI) score, double-hit lymphoma, or disease involvement of multiple or certain extranodal sites (ie, breast, testes, adrenals, kidney) can be at increased risk for lymphoma spread to the CNS.⁴ Strategies to reduce this risk have subsequently been developed for these high-risk patients, though consensus regarding who should be treated and how best to treat patients has been consistent. Recently, retrospective data have also called into question whether our current approaches meaningfully reduce this risk. One such study was a multicenter, international, retrospective observational study that included 2418 adults with aggressive LBCL and a high risk for CNS progression who were treated with curative-intent anti-CD20–based chemoimmunotherapy and who did or did not receive high-dose methotrexate (HD-MTX). Patients who did vs did not receive HD-MTX had a significantly lower risk for CNS progression (adjusted 5-year risk difference 1.6%; adjusted hazard ratio [aHR] 0.59; P = .014), but the significance was lost when considering only those patients who achieved a complete response at chemoimmunotherapy completion (adjusted 5-year risk difference 1.4%; aHR 0.74; P = .30). The study was not sufficiently powered to make definitive conclusions for individual risk groups, though there was no obvious reduction in CNS involvement risk in any high-risk subgroup. With an absolute risk reduction of 1.6% with the use of HD-MTX, 63 patients would require treatment to prevent one CNS progression event over 5 years (Lewis et al). Given the absence of prospective, randomized data, these results, though retrospective in nature, call into question the benefit of CNS prophylaxis. The authors suggest that studies evaluating alternative strategies for prophylaxis and tools for early detection of relapse, such as circulating tumor DNA, may be helpful.

Another study worth noting was one exploring Bruton tyrosine kinase (BTK) inhibition in mantle cell lymphoma (MCL). BTK inhibitors, including zanubrutinib, have emerged as effective therapies for patients with R/R disease. A recent pooled analysis included 112 patients from the BGB-3111-AU-003 and BGB-3111-206 clinical trials who had R/R MCL and received second-line (n = 41) or later-line (n = 71) zanubrutinib (Song et al). At a median follow-up of 35.2 months, patients receiving second-line vs later-line zanubrutinib had significantly improved median overall survival (aHR 0.459; P = .044) and numerically longer median progression-free survival (27.8 vs 22.1 months). Adverse events observed in both groups were consistent with the known safety profile of zanubrutinib. These findings were in line with a prior similar pooled study that demonstrated improved outcomes with second-line ibrutinib for patients with MCL as compared with later-line ibrutinib therapy.⁵ This study, however, did not evaluate the impact on CAR T–cell therapy in MCL, which is also an effective treatment option for patients with R/R disease, and how best to sequence with BTK inhibitors.

Additional References

1.       Locke FL, Miklos DB, Jacobson CA, et al, for All ZUMA-7 Investigators and Contributing Kite Members. Axicabtagene ciloleucel as second-line therapy for large B-cell lymphoma. N Engl J Med. 2022;386:640-654. doi: 10.1056/NEJMoa2116133

2.       Kamdar M, Solomon SR, Arnason J, et al, for theTRANSFORM Investigators. Lisocabtagene maraleucel versus standard of care with salvage chemotherapy followed by autologous stem cell transplantation as second-line treatment in patients with relapsed or refractory large B-cell lymphoma (TRANSFORM): Results from an interim analysis of an open-label, randomised, phase 3 trial. Lancet. 2022;399:2294-2308. doi: 10.1016/S0140-6736(22)00662-6

3.       Gordon LI, Liu FF, Braverman J, et al. Lisocabtagene maraleucel for second-line relapsed or refractory large B-cell lymphoma: Patient-reported outcomes from the PILOT study. Haematologica. 2023 (Aug 31). doi: 10.3324/haematol.2023.283162

4.       Schmitz N, Zeynalova S, Nickelsen M, et al. CNS International Prognostic Index: A risk model for CNS relapse in patients with diffuse large B-cell lymphoma treated with R-CHOP. J Clin Oncol. 2016;34:3150-3156. doi: 10.1200/JCO.2015.65.6520

5.       Dreyling M, Goy A, Hess G, et al. Long-term outcomes with ibrutinib treatment for patients with relapsed/refractory mantle cell lymphoma: A pooled analysis of 3 clinical trials with nearly 10 years of follow-up. Hemasphere. 2022;6:e712. doi: 10.1097/HS9.0000000000000712

The ZUMA-7 and TRANSFORM studies have been practice-changing for the treatment of relapsed/refractory (R/R) large B-cell lymphoma (LBCL). These studies demonstrated an improvement in outcomes with axicabtagene ciloleucel (axi-cel) and lisocabtagene maraleucel (liso-cel), respectively, as compared with standard-of-care treatment (chemotherapy and autologous stem cell transplantation).^1,2 Patients included in these studies were refractory to their initial therapy or experienced relapse within 12 months and were considered fit for autologous stem cell transplant. It has remained unclear, however, whether patients who are not transplant candidates may also derive benefit and tolerate treatment with chimeric antigen receptor (CAR) T-cell therapy. The PILOT study was a single-arm phase 2 study that demonstrated favorable outcomes with liso-cel in this patient population, thus resulting in the approval of liso-cel by the US Food and Drug Administration for this population.³ Recently, the ALYCATE study similarly examined outcomes in transplant-ineligible patients treated with axi-cel (Houot et al). This phase 2 study included 62 patients with high-risk R/R LBCL who underwent leukapheresis and subsequently received second-line axi-cel. The complete metabolic response rate 3 months after axi-cel infusion was 71.0% (95% CI 58.1%-81.8%). At a median 12-month follow-up, the median progression-free survival was 11.8 months (95% CI 8.4-not reached) whereas median overall survival was not reached. Grade ≥ 3 cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity syndrome (ICANS) occurred in 8.1% and 14.5% of patients, respectively. Also of note, patients age ≥ 70 years did not show increased toxicity compared with those age < 70 years, with similar rates of CRS, ICANS, and intensive care unit transfer. This study supports the role of axi-cel in the second-line setting, regardless of transplant eligibility.

Another important study recently published for patients with LBCL examined the role of central nervous system (CNS) prophylaxis (Lewis et al). We know that certain patients with LBCL, including those with a high CNS international prognostic index (IPI) score, double-hit lymphoma, or disease involvement of multiple or certain extranodal sites (ie, breast, testes, adrenals, kidney) can be at increased risk for lymphoma spread to the CNS.⁴ Strategies to reduce this risk have subsequently been developed for these high-risk patients, though consensus regarding who should be treated and how best to treat patients has been consistent. Recently, retrospective data have also called into question whether our current approaches meaningfully reduce this risk. One such study was a multicenter, international, retrospective observational study that included 2418 adults with aggressive LBCL and a high risk for CNS progression who were treated with curative-intent anti-CD20–based chemoimmunotherapy and who did or did not receive high-dose methotrexate (HD-MTX). Patients who did vs did not receive HD-MTX had a significantly lower risk for CNS progression (adjusted 5-year risk difference 1.6%; adjusted hazard ratio [aHR] 0.59; P = .014), but the significance was lost when considering only those patients who achieved a complete response at chemoimmunotherapy completion (adjusted 5-year risk difference 1.4%; aHR 0.74; P = .30). The study was not sufficiently powered to make definitive conclusions for individual risk groups, though there was no obvious reduction in CNS involvement risk in any high-risk subgroup. With an absolute risk reduction of 1.6% with the use of HD-MTX, 63 patients would require treatment to prevent one CNS progression event over 5 years (Lewis et al). Given the absence of prospective, randomized data, these results, though retrospective in nature, call into question the benefit of CNS prophylaxis. The authors suggest that studies evaluating alternative strategies for prophylaxis and tools for early detection of relapse, such as circulating tumor DNA, may be helpful.

Another study worth noting was one exploring Bruton tyrosine kinase (BTK) inhibition in mantle cell lymphoma (MCL). BTK inhibitors, including zanubrutinib, have emerged as effective therapies for patients with R/R disease. A recent pooled analysis included 112 patients from the BGB-3111-AU-003 and BGB-3111-206 clinical trials who had R/R MCL and received second-line (n = 41) or later-line (n = 71) zanubrutinib (Song et al). At a median follow-up of 35.2 months, patients receiving second-line vs later-line zanubrutinib had significantly improved median overall survival (aHR 0.459; P = .044) and numerically longer median progression-free survival (27.8 vs 22.1 months). Adverse events observed in both groups were consistent with the known safety profile of zanubrutinib. These findings were in line with a prior similar pooled study that demonstrated improved outcomes with second-line ibrutinib for patients with MCL as compared with later-line ibrutinib therapy.⁵ This study, however, did not evaluate the impact on CAR T–cell therapy in MCL, which is also an effective treatment option for patients with R/R disease, and how best to sequence with BTK inhibitors.

Additional References

1.       Locke FL, Miklos DB, Jacobson CA, et al, for All ZUMA-7 Investigators and Contributing Kite Members. Axicabtagene ciloleucel as second-line therapy for large B-cell lymphoma. N Engl J Med. 2022;386:640-654. doi: 10.1056/NEJMoa2116133

2.       Kamdar M, Solomon SR, Arnason J, et al, for theTRANSFORM Investigators. Lisocabtagene maraleucel versus standard of care with salvage chemotherapy followed by autologous stem cell transplantation as second-line treatment in patients with relapsed or refractory large B-cell lymphoma (TRANSFORM): Results from an interim analysis of an open-label, randomised, phase 3 trial. Lancet. 2022;399:2294-2308. doi: 10.1016/S0140-6736(22)00662-6

3.       Gordon LI, Liu FF, Braverman J, et al. Lisocabtagene maraleucel for second-line relapsed or refractory large B-cell lymphoma: Patient-reported outcomes from the PILOT study. Haematologica. 2023 (Aug 31). doi: 10.3324/haematol.2023.283162

4.       Schmitz N, Zeynalova S, Nickelsen M, et al. CNS International Prognostic Index: A risk model for CNS relapse in patients with diffuse large B-cell lymphoma treated with R-CHOP. J Clin Oncol. 2016;34:3150-3156. doi: 10.1200/JCO.2015.65.6520

5.       Dreyling M, Goy A, Hess G, et al. Long-term outcomes with ibrutinib treatment for patients with relapsed/refractory mantle cell lymphoma: A pooled analysis of 3 clinical trials with nearly 10 years of follow-up. Hemasphere. 2022;6:e712. doi: 10.1097/HS9.0000000000000712

A type of B-cell lymphoma called early-stage I primary ocular adnexal mucosa-associated lymphoid tissue lymphoma (POAML) has highly favorable survival rates, according to new research presented at the European Society of Medical Oncology (ESMO) Congress 2023. While relapse is common, those rates are significantly lower with radiation therapy.

“Our study represents the largest institutional cohort analysis on the course of patients with stage I POAML,” said first author Linrui Gao, MD, of the department of radiation oncology at the National Clinical Research Center for Cancer, Chinese Academy of Medical Sciences and Peking Union Medical College, in Beijing.

Dr. Gao presented these findings at ESMO 2023, held in Madrid.

“We confirm the indolent nature of this stage I disease, with mortality that is similar to the general population and a low rate of lymphoma-attributed mortality,” she said, adding that “radiation therapy was associated with the lowest relapse or disease progression, compared with [other treatments].”

POAML, which can involve lesions in areas including the eyelid, conjunctiva, orbit, and lacrimal gland, makes up about 7% of mucosa-associated lymphoid tissue (MALT) lymphomas. However, the incidence is reported to be steadily increasing. With the majority of patients, 70%-85%, diagnosed as stage I, consensus on treatment approaches is lacking.

Guidelines typically recommend radiation therapy as the standard of care, and approximately 70% of POAML patients do receive the therapy, compared with only about 36% of those with early-stage MALT lymphoma, with the indolent nature of the disease likely weighing on decisions to forgo the treatment, Dr. Gao reported.

“Adoption of initial radiotherapy in early-stage POAML is relatively low worldwide, with possible reasons being [concerns] of a low survival benefit and long-term toxicities,” she said.

To evaluate the long-term outcomes based on baseline clinical features and treatments, Dr. Gao and colleagues conducted a retrospective study of 262 patients with stage I POAML (ipsilateral or bilateral disease), enrolled between January 2000 and December 2020 at two hospitals in China.

Of the patients, who had a median age of 55 and a male-female ratio of 1:3, 82 were initially treated with radiation therapy, 81 with observation, 70 with surgery, and 29 with systemic treatment.

Those receiving radiation therapy had higher rates of an Eastern Cooperative Oncology Group performance status of 1 or higher (P = .02), higher elevations of LDH (P = .03), and higher rates of chronic disease (P < .001), while other baseline characteristics between the groups, including age, T stage, symptom duration, and other factors, were similar.

With a median follow-up of 66 months, the 5-year and 10-year overall survival rates were 96.8% and 90%, respectively, which is similar to the survival rate in the general population in China.

Likewise, the 5- and 10-year rates of lymphoma-specific mortality were both extremely low, at 0.4%, and the corresponding rates of competing nonlymphoma mortality at 5 and 10 years were 2.3% and 4.2%, also consistent with the general population.

The 5- and 10-year mortality rates remained similar to the general population in stratifying patients according to the initial treatment type (P = .767 between treatments).

In terms of recurrence, the overall failure rates were relatively high, with 19.5% of patients experiencing relapse at 5 years and 24.05% at 10 years.

“The failure rates show that the risk of relapse in POAML does not decrease over time,” Dr. Gao said.

Notably, those treated with radiation therapy had a significantly decreased 5-year cumulative risk of failure (8.5%), compared with those who only received observation (29.6%), surgery (22.9%), or systemic treatment (17.2%; overall, P = .002).

The most common failure site was the ipsilateral orbit, and again, rates of those relapses were significantly lower with radiation therapy (2.4%), compared with observation (23.5%), surgery (21.4%), and systemic treatment (17.3%).

However, rates of relapses in other sites, including the contralateral orbit, extraocular site, and multiple sites, were similar among all treatment groups. One patient receiving systemic treatment had large cell transformation, associated with poorer outcomes.

Strategies after recurrence were salvage therapy for 53 patients, including 27 receiving radiation therapy, and observation for 10 patients.

Dr. Gao noted that treatment failure was not associated with higher mortality rates. “However, given the limited number of cases, we think more cases and longer follow-up are needed,” she told MDedge.

Among the most common acute toxicities were ocular dermatitis or mucositis, described as mild, among 23 patients receiving radiation therapy. Nine patients experienced postoperative complications of mild eye irritation and periorbital edema, and five patients receiving systemic treatment experienced grade 2-3 leukopenia. There were no severe adverse events.

In terms of late ocular adverse effects, overall, 3 patients in the radiation therapy group developed cataracts and 143 patients developed dry-eye disease.

“Radiation therapy was associated with the lowest rate of relapse progression, compared with observation, surgery, and systemic treatment, with similar overall and recurrent survival,” Dr. Gao said.

“Based on our study results, radiotherapy should be considered as the optimal treatment for all patients with stage I disease because of its lowest failure risk and minor toxicity,” Dr. Gao told MDedge.

“However, the radiotherapy dose and techniques should be further optimized in good clinical trials,” she noted. “There are some clinical studies undergoing to explore the modern radiotherapy strategy, including by our group.”

Commenting on the study, discussant Olivier Casasnovas, MD, PhD, of the department of hematology, University Hospital Francois Mitterrand, in Dijon, France, noted that “interestingly, radiotherapy reduced the risk of local relapse but not systemic relapse.”


 

Benefits linked to radiation therapy dose?

Furthermore, the study adds to evidence suggesting the role of dose in radiation therapy’s benefits in POAML, Dr. Casanovas noted. He pointed to previous research showing that, with a median radiotherapy dose of 26 Gy, stage I POAML patients had a local relapse rate of 9.5%, whereas in the current study, which reported a median radiotherapy dose of 30.6 Gy, the local relapse rate was just 2%.

“Regarding the risk of local relapse, it’s important to see that, as previous published, the risk of a local relapse depends probably on the dose of radiotherapy,” he said.

The results indicate that “radiation therapy could impact patients’ outcome. In comparison to previous research, this suggests benefits from a higher dose.”

He added that “it would be interesting to test in this series if patients receiving more or less 30 Gy had different outcomes or the risks of failure at different sites.”

Overall, the study confirms that POAML “can be safely treated with radiation therapy, which allows for a better chance of local control, compared with other options, but does not preclude relapse over time,” Dr. Casasnovas concluded, adding, “I think that a standardization of radiotherapy dose is warranted to provide guidelines to clinicians treating this infrequent population of patients.”

The authors had no disclosures to report.

A type of B-cell lymphoma called early-stage I primary ocular adnexal mucosa-associated lymphoid tissue lymphoma (POAML) has highly favorable survival rates, according to new research presented at the European Society of Medical Oncology (ESMO) Congress 2023. While relapse is common, those rates are significantly lower with radiation therapy.

“Our study represents the largest institutional cohort analysis on the course of patients with stage I POAML,” said first author Linrui Gao, MD, of the department of radiation oncology at the National Clinical Research Center for Cancer, Chinese Academy of Medical Sciences and Peking Union Medical College, in Beijing.

Dr. Gao presented these findings at ESMO 2023, held in Madrid.

“We confirm the indolent nature of this stage I disease, with mortality that is similar to the general population and a low rate of lymphoma-attributed mortality,” she said, adding that “radiation therapy was associated with the lowest relapse or disease progression, compared with [other treatments].”

POAML, which can involve lesions in areas including the eyelid, conjunctiva, orbit, and lacrimal gland, makes up about 7% of mucosa-associated lymphoid tissue (MALT) lymphomas. However, the incidence is reported to be steadily increasing. With the majority of patients, 70%-85%, diagnosed as stage I, consensus on treatment approaches is lacking.

Guidelines typically recommend radiation therapy as the standard of care, and approximately 70% of POAML patients do receive the therapy, compared with only about 36% of those with early-stage MALT lymphoma, with the indolent nature of the disease likely weighing on decisions to forgo the treatment, Dr. Gao reported.

“Adoption of initial radiotherapy in early-stage POAML is relatively low worldwide, with possible reasons being [concerns] of a low survival benefit and long-term toxicities,” she said.

To evaluate the long-term outcomes based on baseline clinical features and treatments, Dr. Gao and colleagues conducted a retrospective study of 262 patients with stage I POAML (ipsilateral or bilateral disease), enrolled between January 2000 and December 2020 at two hospitals in China.

Of the patients, who had a median age of 55 and a male-female ratio of 1:3, 82 were initially treated with radiation therapy, 81 with observation, 70 with surgery, and 29 with systemic treatment.

Those receiving radiation therapy had higher rates of an Eastern Cooperative Oncology Group performance status of 1 or higher (P = .02), higher elevations of LDH (P = .03), and higher rates of chronic disease (P < .001), while other baseline characteristics between the groups, including age, T stage, symptom duration, and other factors, were similar.

With a median follow-up of 66 months, the 5-year and 10-year overall survival rates were 96.8% and 90%, respectively, which is similar to the survival rate in the general population in China.

Likewise, the 5- and 10-year rates of lymphoma-specific mortality were both extremely low, at 0.4%, and the corresponding rates of competing nonlymphoma mortality at 5 and 10 years were 2.3% and 4.2%, also consistent with the general population.

The 5- and 10-year mortality rates remained similar to the general population in stratifying patients according to the initial treatment type (P = .767 between treatments).

In terms of recurrence, the overall failure rates were relatively high, with 19.5% of patients experiencing relapse at 5 years and 24.05% at 10 years.

“The failure rates show that the risk of relapse in POAML does not decrease over time,” Dr. Gao said.

Notably, those treated with radiation therapy had a significantly decreased 5-year cumulative risk of failure (8.5%), compared with those who only received observation (29.6%), surgery (22.9%), or systemic treatment (17.2%; overall, P = .002).

The most common failure site was the ipsilateral orbit, and again, rates of those relapses were significantly lower with radiation therapy (2.4%), compared with observation (23.5%), surgery (21.4%), and systemic treatment (17.3%).

However, rates of relapses in other sites, including the contralateral orbit, extraocular site, and multiple sites, were similar among all treatment groups. One patient receiving systemic treatment had large cell transformation, associated with poorer outcomes.

Strategies after recurrence were salvage therapy for 53 patients, including 27 receiving radiation therapy, and observation for 10 patients.

Dr. Gao noted that treatment failure was not associated with higher mortality rates. “However, given the limited number of cases, we think more cases and longer follow-up are needed,” she told MDedge.

Among the most common acute toxicities were ocular dermatitis or mucositis, described as mild, among 23 patients receiving radiation therapy. Nine patients experienced postoperative complications of mild eye irritation and periorbital edema, and five patients receiving systemic treatment experienced grade 2-3 leukopenia. There were no severe adverse events.

In terms of late ocular adverse effects, overall, 3 patients in the radiation therapy group developed cataracts and 143 patients developed dry-eye disease.

“Radiation therapy was associated with the lowest rate of relapse progression, compared with observation, surgery, and systemic treatment, with similar overall and recurrent survival,” Dr. Gao said.

“Based on our study results, radiotherapy should be considered as the optimal treatment for all patients with stage I disease because of its lowest failure risk and minor toxicity,” Dr. Gao told MDedge.

“However, the radiotherapy dose and techniques should be further optimized in good clinical trials,” she noted. “There are some clinical studies undergoing to explore the modern radiotherapy strategy, including by our group.”

Commenting on the study, discussant Olivier Casasnovas, MD, PhD, of the department of hematology, University Hospital Francois Mitterrand, in Dijon, France, noted that “interestingly, radiotherapy reduced the risk of local relapse but not systemic relapse.”


 

Benefits linked to radiation therapy dose?

Furthermore, the study adds to evidence suggesting the role of dose in radiation therapy’s benefits in POAML, Dr. Casanovas noted. He pointed to previous research showing that, with a median radiotherapy dose of 26 Gy, stage I POAML patients had a local relapse rate of 9.5%, whereas in the current study, which reported a median radiotherapy dose of 30.6 Gy, the local relapse rate was just 2%.

“Regarding the risk of local relapse, it’s important to see that, as previous published, the risk of a local relapse depends probably on the dose of radiotherapy,” he said.

The results indicate that “radiation therapy could impact patients’ outcome. In comparison to previous research, this suggests benefits from a higher dose.”

He added that “it would be interesting to test in this series if patients receiving more or less 30 Gy had different outcomes or the risks of failure at different sites.”

Overall, the study confirms that POAML “can be safely treated with radiation therapy, which allows for a better chance of local control, compared with other options, but does not preclude relapse over time,” Dr. Casasnovas concluded, adding, “I think that a standardization of radiotherapy dose is warranted to provide guidelines to clinicians treating this infrequent population of patients.”

The authors had no disclosures to report.

A type of B-cell lymphoma called early-stage I primary ocular adnexal mucosa-associated lymphoid tissue lymphoma (POAML) has highly favorable survival rates, according to new research presented at the European Society of Medical Oncology (ESMO) Congress 2023. While relapse is common, those rates are significantly lower with radiation therapy.

“Our study represents the largest institutional cohort analysis on the course of patients with stage I POAML,” said first author Linrui Gao, MD, of the department of radiation oncology at the National Clinical Research Center for Cancer, Chinese Academy of Medical Sciences and Peking Union Medical College, in Beijing.

Dr. Gao presented these findings at ESMO 2023, held in Madrid.

“We confirm the indolent nature of this stage I disease, with mortality that is similar to the general population and a low rate of lymphoma-attributed mortality,” she said, adding that “radiation therapy was associated with the lowest relapse or disease progression, compared with [other treatments].”

POAML, which can involve lesions in areas including the eyelid, conjunctiva, orbit, and lacrimal gland, makes up about 7% of mucosa-associated lymphoid tissue (MALT) lymphomas. However, the incidence is reported to be steadily increasing. With the majority of patients, 70%-85%, diagnosed as stage I, consensus on treatment approaches is lacking.

Guidelines typically recommend radiation therapy as the standard of care, and approximately 70% of POAML patients do receive the therapy, compared with only about 36% of those with early-stage MALT lymphoma, with the indolent nature of the disease likely weighing on decisions to forgo the treatment, Dr. Gao reported.

“Adoption of initial radiotherapy in early-stage POAML is relatively low worldwide, with possible reasons being [concerns] of a low survival benefit and long-term toxicities,” she said.

To evaluate the long-term outcomes based on baseline clinical features and treatments, Dr. Gao and colleagues conducted a retrospective study of 262 patients with stage I POAML (ipsilateral or bilateral disease), enrolled between January 2000 and December 2020 at two hospitals in China.

Of the patients, who had a median age of 55 and a male-female ratio of 1:3, 82 were initially treated with radiation therapy, 81 with observation, 70 with surgery, and 29 with systemic treatment.

Those receiving radiation therapy had higher rates of an Eastern Cooperative Oncology Group performance status of 1 or higher (P = .02), higher elevations of LDH (P = .03), and higher rates of chronic disease (P < .001), while other baseline characteristics between the groups, including age, T stage, symptom duration, and other factors, were similar.

With a median follow-up of 66 months, the 5-year and 10-year overall survival rates were 96.8% and 90%, respectively, which is similar to the survival rate in the general population in China.

Likewise, the 5- and 10-year rates of lymphoma-specific mortality were both extremely low, at 0.4%, and the corresponding rates of competing nonlymphoma mortality at 5 and 10 years were 2.3% and 4.2%, also consistent with the general population.

The 5- and 10-year mortality rates remained similar to the general population in stratifying patients according to the initial treatment type (P = .767 between treatments).

In terms of recurrence, the overall failure rates were relatively high, with 19.5% of patients experiencing relapse at 5 years and 24.05% at 10 years.

“The failure rates show that the risk of relapse in POAML does not decrease over time,” Dr. Gao said.

Notably, those treated with radiation therapy had a significantly decreased 5-year cumulative risk of failure (8.5%), compared with those who only received observation (29.6%), surgery (22.9%), or systemic treatment (17.2%; overall, P = .002).

The most common failure site was the ipsilateral orbit, and again, rates of those relapses were significantly lower with radiation therapy (2.4%), compared with observation (23.5%), surgery (21.4%), and systemic treatment (17.3%).

However, rates of relapses in other sites, including the contralateral orbit, extraocular site, and multiple sites, were similar among all treatment groups. One patient receiving systemic treatment had large cell transformation, associated with poorer outcomes.

Strategies after recurrence were salvage therapy for 53 patients, including 27 receiving radiation therapy, and observation for 10 patients.

Dr. Gao noted that treatment failure was not associated with higher mortality rates. “However, given the limited number of cases, we think more cases and longer follow-up are needed,” she told MDedge.

Among the most common acute toxicities were ocular dermatitis or mucositis, described as mild, among 23 patients receiving radiation therapy. Nine patients experienced postoperative complications of mild eye irritation and periorbital edema, and five patients receiving systemic treatment experienced grade 2-3 leukopenia. There were no severe adverse events.

In terms of late ocular adverse effects, overall, 3 patients in the radiation therapy group developed cataracts and 143 patients developed dry-eye disease.

“Radiation therapy was associated with the lowest rate of relapse progression, compared with observation, surgery, and systemic treatment, with similar overall and recurrent survival,” Dr. Gao said.

“Based on our study results, radiotherapy should be considered as the optimal treatment for all patients with stage I disease because of its lowest failure risk and minor toxicity,” Dr. Gao told MDedge.

“However, the radiotherapy dose and techniques should be further optimized in good clinical trials,” she noted. “There are some clinical studies undergoing to explore the modern radiotherapy strategy, including by our group.”

Commenting on the study, discussant Olivier Casasnovas, MD, PhD, of the department of hematology, University Hospital Francois Mitterrand, in Dijon, France, noted that “interestingly, radiotherapy reduced the risk of local relapse but not systemic relapse.”


 

Benefits linked to radiation therapy dose?

Furthermore, the study adds to evidence suggesting the role of dose in radiation therapy’s benefits in POAML, Dr. Casanovas noted. He pointed to previous research showing that, with a median radiotherapy dose of 26 Gy, stage I POAML patients had a local relapse rate of 9.5%, whereas in the current study, which reported a median radiotherapy dose of 30.6 Gy, the local relapse rate was just 2%.

“Regarding the risk of local relapse, it’s important to see that, as previous published, the risk of a local relapse depends probably on the dose of radiotherapy,” he said.

The results indicate that “radiation therapy could impact patients’ outcome. In comparison to previous research, this suggests benefits from a higher dose.”

He added that “it would be interesting to test in this series if patients receiving more or less 30 Gy had different outcomes or the risks of failure at different sites.”

Overall, the study confirms that POAML “can be safely treated with radiation therapy, which allows for a better chance of local control, compared with other options, but does not preclude relapse over time,” Dr. Casasnovas concluded, adding, “I think that a standardization of radiotherapy dose is warranted to provide guidelines to clinicians treating this infrequent population of patients.”

The authors had no disclosures to report.

Key clinical point: Long-term exposure to brominated trihalomethanes (THM) in drinking water and swimming pool water is associated with increased odds of developing chronic lymphocytic leukemia (CLL).

Major finding: The odds of developing CLL increased by 22% for every 10 μg/L increase in the level of brominated THM in drinking water (adjusted odds ratio [aOR] 1.22; 95% CI 1.14-1.31). Swimming pool users vs non-users (swimming pool attendance ≥ 10 times vs < 10 times in life) had significantly increased odds of CLL (aOR 2.38; 95% CI 1.61-3.52).

Study details: This multicentric multicase-control study included 170 patients with CLL (age 20-85 years) and 1442 matched population-based control individuals without CLL.

Disclosures: This study was funded by European Commission grants and others. The authors declared no conflicts of interest.

Source: Donat-Vargas C et al. Lifetime exposure to brominated trihalomethanes in drinking water and swimming pool attendance are associated with chronic lymphocytic leukemia: A multicase-control study in Spain (MCC-Spain). J Expo Sci Environ Epidemiol. 2023 (Sep 19). doi: 10.1038/s41370-023-00600-7

Key clinical point: Long-term exposure to brominated trihalomethanes (THM) in drinking water and swimming pool water is associated with increased odds of developing chronic lymphocytic leukemia (CLL).

Major finding: The odds of developing CLL increased by 22% for every 10 μg/L increase in the level of brominated THM in drinking water (adjusted odds ratio [aOR] 1.22; 95% CI 1.14-1.31). Swimming pool users vs non-users (swimming pool attendance ≥ 10 times vs < 10 times in life) had significantly increased odds of CLL (aOR 2.38; 95% CI 1.61-3.52).

Study details: This multicentric multicase-control study included 170 patients with CLL (age 20-85 years) and 1442 matched population-based control individuals without CLL.

Disclosures: This study was funded by European Commission grants and others. The authors declared no conflicts of interest.

Source: Donat-Vargas C et al. Lifetime exposure to brominated trihalomethanes in drinking water and swimming pool attendance are associated with chronic lymphocytic leukemia: A multicase-control study in Spain (MCC-Spain). J Expo Sci Environ Epidemiol. 2023 (Sep 19). doi: 10.1038/s41370-023-00600-7

Key clinical point: Long-term exposure to brominated trihalomethanes (THM) in drinking water and swimming pool water is associated with increased odds of developing chronic lymphocytic leukemia (CLL).

Major finding: The odds of developing CLL increased by 22% for every 10 μg/L increase in the level of brominated THM in drinking water (adjusted odds ratio [aOR] 1.22; 95% CI 1.14-1.31). Swimming pool users vs non-users (swimming pool attendance ≥ 10 times vs < 10 times in life) had significantly increased odds of CLL (aOR 2.38; 95% CI 1.61-3.52).

Study details: This multicentric multicase-control study included 170 patients with CLL (age 20-85 years) and 1442 matched population-based control individuals without CLL.

Disclosures: This study was funded by European Commission grants and others. The authors declared no conflicts of interest.

Source: Donat-Vargas C et al. Lifetime exposure to brominated trihalomethanes in drinking water and swimming pool attendance are associated with chronic lymphocytic leukemia: A multicase-control study in Spain (MCC-Spain). J Expo Sci Environ Epidemiol. 2023 (Sep 19). doi: 10.1038/s41370-023-00600-7

Key clinical point: Chimeric antigen receptor (CAR) T-cell therapy is effective for and can be safely administered to older patients with relapsed or refractory diffuse large B-cell lymphoma (DLBCL) despite an increased infection rate.

Major finding: At a median follow-up of 16.3 months, the objective response rate was 67%. Median progression-free and overall survival were 10.3 (95% CI 3.3-not reached) and 28.4 (95% CI 12.4-not reached) months, respectively. Patients age > 70 years and age ≤ 70 years had comparable progression-free (P = .6) and overall (P = .5) survival and comparable incidence rates of immune effector cell-associated neurotoxicity syndrome (P = .19); however, patients age > 70 years vs age ≤ 70 years had higher all-grade infection rates (79% vs 40%, respectively).

Study details: This single-center retrospective study included 66 patients with relapsed or refractory DLBCL who received either tisagenlecleucel or axicabtagene ciloleucel, of whom 21% were age > 70 years.

Disclosures: This study did not receive any specific funding. The authors declared no conflicts of interest.

Source: Trando A et al. Outcomes of chimeric antigen receptor (CAR) T-cell therapy in patients with large B-cell lymphoma (LBCL): A single-institution experience. Cancers. 2023; 15(18):4671 (Sep 21). doi: 10.3390/cancers15184671

Key clinical point: Chimeric antigen receptor (CAR) T-cell therapy is effective for and can be safely administered to older patients with relapsed or refractory diffuse large B-cell lymphoma (DLBCL) despite an increased infection rate.

Major finding: At a median follow-up of 16.3 months, the objective response rate was 67%. Median progression-free and overall survival were 10.3 (95% CI 3.3-not reached) and 28.4 (95% CI 12.4-not reached) months, respectively. Patients age > 70 years and age ≤ 70 years had comparable progression-free (P = .6) and overall (P = .5) survival and comparable incidence rates of immune effector cell-associated neurotoxicity syndrome (P = .19); however, patients age > 70 years vs age ≤ 70 years had higher all-grade infection rates (79% vs 40%, respectively).

Study details: This single-center retrospective study included 66 patients with relapsed or refractory DLBCL who received either tisagenlecleucel or axicabtagene ciloleucel, of whom 21% were age > 70 years.

Disclosures: This study did not receive any specific funding. The authors declared no conflicts of interest.

Source: Trando A et al. Outcomes of chimeric antigen receptor (CAR) T-cell therapy in patients with large B-cell lymphoma (LBCL): A single-institution experience. Cancers. 2023; 15(18):4671 (Sep 21). doi: 10.3390/cancers15184671

Key clinical point: Chimeric antigen receptor (CAR) T-cell therapy is effective for and can be safely administered to older patients with relapsed or refractory diffuse large B-cell lymphoma (DLBCL) despite an increased infection rate.

Major finding: At a median follow-up of 16.3 months, the objective response rate was 67%. Median progression-free and overall survival were 10.3 (95% CI 3.3-not reached) and 28.4 (95% CI 12.4-not reached) months, respectively. Patients age > 70 years and age ≤ 70 years had comparable progression-free (P = .6) and overall (P = .5) survival and comparable incidence rates of immune effector cell-associated neurotoxicity syndrome (P = .19); however, patients age > 70 years vs age ≤ 70 years had higher all-grade infection rates (79% vs 40%, respectively).

Study details: This single-center retrospective study included 66 patients with relapsed or refractory DLBCL who received either tisagenlecleucel or axicabtagene ciloleucel, of whom 21% were age > 70 years.

Disclosures: This study did not receive any specific funding. The authors declared no conflicts of interest.

Source: Trando A et al. Outcomes of chimeric antigen receptor (CAR) T-cell therapy in patients with large B-cell lymphoma (LBCL): A single-institution experience. Cancers. 2023; 15(18):4671 (Sep 21). doi: 10.3390/cancers15184671