tretinoin and Pyoderma

Three male patients with severe nodulocystic acne were treated with oral isotretinoin in a dosage of 0.5 to 1.0 mg/kg/day. A flare of their disease developed, characterized by an inflammatory, hemorrhagic, pyogenic, granuloma-like response of previously crusted acne lesions. This reaction occurred between the sixth and ninth weeks of treatment and was confined entirely to the chest and back. The severity of the reaction prompted the administration of oral prednisone and, in two cases, the discontinuation of isotretinoin therapy. In one patient, pyoderma gangrenosum developed on the thigh. The exact incidence of this pyogenic, granuloma-like reaction to isotretinoin is unknown, although we have seen it in three of 66 patients with nodulocystic acne treated with this drug. The cause of the reaction is unknown, but it may be due to the increased skin fragility and vascular proliferation known to be induced by isotretinoin.

Topics: Acne Vulgaris; Administration, Oral; Adult; Double-Blind Method; Drug Eruptions; Granuloma; Hemorrhage; Humans; Isotretinoin; Male; Pyoderma; Skin Ulcer; Tretinoin

Topics: Adult; Facial Dermatoses; Female; Humans; Isotretinoin; Pyoderma; Tretinoin

Malignant pyoderma is a destructive, ulcerating skin disease that occurs chiefly in young adults. Only eight cases of this rare disease have been reported. The head and neck have been involved in all cases, and a predilection for the periauricular region has been noted in several of the cases. Although the disease is progressive and chronic, responses to high-dose systemic corticosteroids have been noted, but usually a flare is associated with a reduction in dose. An additional case is described in which therapy with isotretinoin and sulfapyridine led to complete remission.

Topics: Adolescent; Adult; Drug Therapy, Combination; Female; Follow-Up Studies; Humans; Isomerism; Isotretinoin; Male; Middle Aged; Pyoderma; Sulfanilamides; Sulfapyridine; Time Factors; Tretinoin

Topics: Adolescent; Humans; Isomerism; Isotretinoin; Male; Pyoderma; Skin Diseases, Infectious; Tretinoin

Topics: Acne Vulgaris; Adolescent; Adult; Anti-Bacterial Agents; Child; Child, Preschool; Female; Humans; Pyoderma; Skin; Tretinoin