Generalized eruptive keratoacanthomas of Grzybowski treated with isotretinoin

Generalized eruptive keratoacanthomas of Grzybowski is a rare condition of unknown etiology. The disease is characterized by the abrupt onset of many small crateriform papules on the skin and mucous membranes. The authors report of a man with multiple eruptive keratoacanthomas of Grzybowski who responded favorably to oral isotretinoin therapy. After 2 years of follow-up, a complete regression of all lesions was observed, and this rapid clearance under isotretinoin therapy is intriguing with regard to the possible etiology of the condition.