Treatment of multiple keratoacanthomas with intralesional fluorouracil

A keratoacanthoma is a benign epithelial growth most often found in sun-exposed skin of the elderly. Two main groups of multiple keratoacanthomas have been described: the Ferguson-Smith type and the Grzybowski type. A patient with multiple keratoacanthomas of the Ferguson Smith type is described and the treatment with intralesional 5-fluorouracil is explained. Intralesional therapy with 5-fluorouracil is a safe treatment and may be the treatment of choice for multiple keratoacanthomas and solitary lesions which are difficult to remove surgically.