Stucco keratosis is considered a variant of seborrheic keratosis.1 The name probably derives from the resemblance of the lesions to old stucco on the sides of houses. Stucco keratosis is thought to result from thickening of the epidermis, in particular the stratum corneum, which histologically resembles a church spire. The lesions are white or gray delled keratotic papules smaller than 5 mm; they are typically found on the legs of elderly men. When the lesions are removed, they leave a peripheral collarette of scale. Stucco keratoses are sometimes confused with actinic keratoses. Treatment options include liquid nitrogen therapy and electrodesiccation with curettage.
1. Shall L, Marks R. Stucco keratoses. A clinicopathological study. Acta Derm Venereol. 1991;71:258-261.