Summary
We report eight cases of patients with severe acne who were treated with Isotretinoin and developed painful nodules in their axillae and groin consistent with Hidradenitis Suppurativa (HS). The pathogenesis of HS is still not completely understood; recent research from a study in 2011 of biopsies from HS lesions showed a reduction or absence of sebaceous glands compared to normal skin in HS patients and the author suggested this contributes to the pathogenesis of the disease. Interestingly the main effect of Isotretinoin is to decrease the size and action of sebaceous glands; so hypothetically, as Isotretinoin acts by reducing the sebaceous glands further it could potentially aggravate the condition. Our experience has instilled caution in our prescribing of Isotretinoin; patients are questioned about symptoms of HS prior to and during treatment, particularly patients with acne conglobata.
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