[Squamous epithelial and basal cell carcinomas in naevus sebaceus (Jadassohn)].

Investigation of 181 nevi sebacei (Jadassohn) revealed the development of basal cell carcinoma in 21 cases, prickle-cell carcinoma in 1 patient. 2 basal cell carcinomas had been taken from different parts of the same systematized nevus. All these secondary tumors had developed in postpubertal patients.