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For several years, this 16-year-old boy has had severe acne on his chest and back. The condition has steadily worsened despite use of OTC medications, including benzoyl peroxide–containing topical products. He has never received prescription treatment. His primary care provider, concerned that something more than acne could be involved, refers him to dermatology for evaluation and treatment.
The boy’s health is reportedly otherwise excellent. Family history is positive for severe acne on both sides of his family; two of his older siblings have had similar problems.
EXAMINATION
The central portion of the boy’s chest is covered by an impressive collection of discrete and confluent crusts and erosions. Some are quite deep, and the patient admits to picking at them. Little if any erythema surrounds the lesions.
Very little acne is seen on the boy’s face, but fairly dense acne vulgaris is observed on his upper back.
Following a brief but thorough discussion, the decision is made to start therapy with low-dose isotretinoin (20 mg/d), after the appropriate bloodwork is obtained. Within a week, the patient presents to the emergency department (ED) for worsening of his chest acne, along with pain and bleeding from some of the lesions.
What’s the diagnosis?
DISCUSSION
The risk for granulation tissue formation is a well-known though rare adverse effect of isotretinoin use—one that had been discussed thoroughly with the patient and his parents prior to prescription. There is no unanimity of opinion regarding the mechanism whereby this response occurs, but it is real. It can affect such areas as seen in this patient’s case but also causes a similar problem in the perionychial tissues, creating a condition quite similar to an ingrown toenail (cryptonychia). This author has also seen the same phenomenon in fingernails.
In this patient’s case, after discharge from the ED, he presented immediately to his primary care provider, who in turn called the dermatology clinic. When we saw him, there was clear evidence of inappropriate granulation formation—far worse than the initial acne had been.
The patient was given an intramuscular injection of 40 mg triamcinolone and prescribed minocycline 100 mg bid. He had already stopped taking the isotretinoin and was strongly advised not to restart it for the foreseeable future. In hindsight, he probably should have been started on minocycline and a 3-week prednisone taper to calm down his chest acne before the isotretinoin was started.
At a follow-up appointment 3 weeks later, his condition was much improved (at least back to baseline). But he will almost certainly develop hypertrophic scarring on his chest—and given the severity of his acne and the strong family history, he may well have a suboptimal response to isotretinoin when and if we return to that medication.
TAKE-HOME LEARNING POINTS
- In rare instances, isotretinoin therapy can trigger the formation of inappropriate granulation tissue on the face, back, chest, and even perionychial areas.
- There is evidence that the more inflamed the acne, the greater the likelihood of this adverse effect.
- With severely inflamed acne, consideration should be given to using small initial doses of isotretinoin or decreasing the inflammation through use of systemic steroids or doxycycline or minocycline.
For several years, this 16-year-old boy has had severe acne on his chest and back. The condition has steadily worsened despite use of OTC medications, including benzoyl peroxide–containing topical products. He has never received prescription treatment. His primary care provider, concerned that something more than acne could be involved, refers him to dermatology for evaluation and treatment.
The boy’s health is reportedly otherwise excellent. Family history is positive for severe acne on both sides of his family; two of his older siblings have had similar problems.
EXAMINATION
The central portion of the boy’s chest is covered by an impressive collection of discrete and confluent crusts and erosions. Some are quite deep, and the patient admits to picking at them. Little if any erythema surrounds the lesions.
Very little acne is seen on the boy’s face, but fairly dense acne vulgaris is observed on his upper back.
Following a brief but thorough discussion, the decision is made to start therapy with low-dose isotretinoin (20 mg/d), after the appropriate bloodwork is obtained. Within a week, the patient presents to the emergency department (ED) for worsening of his chest acne, along with pain and bleeding from some of the lesions.
What’s the diagnosis?
DISCUSSION
The risk for granulation tissue formation is a well-known though rare adverse effect of isotretinoin use—one that had been discussed thoroughly with the patient and his parents prior to prescription. There is no unanimity of opinion regarding the mechanism whereby this response occurs, but it is real. It can affect such areas as seen in this patient’s case but also causes a similar problem in the perionychial tissues, creating a condition quite similar to an ingrown toenail (cryptonychia). This author has also seen the same phenomenon in fingernails.
In this patient’s case, after discharge from the ED, he presented immediately to his primary care provider, who in turn called the dermatology clinic. When we saw him, there was clear evidence of inappropriate granulation formation—far worse than the initial acne had been.
The patient was given an intramuscular injection of 40 mg triamcinolone and prescribed minocycline 100 mg bid. He had already stopped taking the isotretinoin and was strongly advised not to restart it for the foreseeable future. In hindsight, he probably should have been started on minocycline and a 3-week prednisone taper to calm down his chest acne before the isotretinoin was started.
At a follow-up appointment 3 weeks later, his condition was much improved (at least back to baseline). But he will almost certainly develop hypertrophic scarring on his chest—and given the severity of his acne and the strong family history, he may well have a suboptimal response to isotretinoin when and if we return to that medication.
TAKE-HOME LEARNING POINTS
- In rare instances, isotretinoin therapy can trigger the formation of inappropriate granulation tissue on the face, back, chest, and even perionychial areas.
- There is evidence that the more inflamed the acne, the greater the likelihood of this adverse effect.
- With severely inflamed acne, consideration should be given to using small initial doses of isotretinoin or decreasing the inflammation through use of systemic steroids or doxycycline or minocycline.
For several years, this 16-year-old boy has had severe acne on his chest and back. The condition has steadily worsened despite use of OTC medications, including benzoyl peroxide–containing topical products. He has never received prescription treatment. His primary care provider, concerned that something more than acne could be involved, refers him to dermatology for evaluation and treatment.
The boy’s health is reportedly otherwise excellent. Family history is positive for severe acne on both sides of his family; two of his older siblings have had similar problems.
EXAMINATION
The central portion of the boy’s chest is covered by an impressive collection of discrete and confluent crusts and erosions. Some are quite deep, and the patient admits to picking at them. Little if any erythema surrounds the lesions.
Very little acne is seen on the boy’s face, but fairly dense acne vulgaris is observed on his upper back.
Following a brief but thorough discussion, the decision is made to start therapy with low-dose isotretinoin (20 mg/d), after the appropriate bloodwork is obtained. Within a week, the patient presents to the emergency department (ED) for worsening of his chest acne, along with pain and bleeding from some of the lesions.
What’s the diagnosis?
DISCUSSION
The risk for granulation tissue formation is a well-known though rare adverse effect of isotretinoin use—one that had been discussed thoroughly with the patient and his parents prior to prescription. There is no unanimity of opinion regarding the mechanism whereby this response occurs, but it is real. It can affect such areas as seen in this patient’s case but also causes a similar problem in the perionychial tissues, creating a condition quite similar to an ingrown toenail (cryptonychia). This author has also seen the same phenomenon in fingernails.
In this patient’s case, after discharge from the ED, he presented immediately to his primary care provider, who in turn called the dermatology clinic. When we saw him, there was clear evidence of inappropriate granulation formation—far worse than the initial acne had been.
The patient was given an intramuscular injection of 40 mg triamcinolone and prescribed minocycline 100 mg bid. He had already stopped taking the isotretinoin and was strongly advised not to restart it for the foreseeable future. In hindsight, he probably should have been started on minocycline and a 3-week prednisone taper to calm down his chest acne before the isotretinoin was started.
At a follow-up appointment 3 weeks later, his condition was much improved (at least back to baseline). But he will almost certainly develop hypertrophic scarring on his chest—and given the severity of his acne and the strong family history, he may well have a suboptimal response to isotretinoin when and if we return to that medication.
TAKE-HOME LEARNING POINTS
- In rare instances, isotretinoin therapy can trigger the formation of inappropriate granulation tissue on the face, back, chest, and even perionychial areas.
- There is evidence that the more inflamed the acne, the greater the likelihood of this adverse effect.
- With severely inflamed acne, consideration should be given to using small initial doses of isotretinoin or decreasing the inflammation through use of systemic steroids or doxycycline or minocycline.
