Cutaneous horn can be a clinical manifestation of underlying sebaceous carcinoma. Br J Dermatol 2007;156:180-2.Kitagawa H, Mizuno M, Nakamura Y, Kurokawa I, Mizutani H. Cutaneous horn can be a clinical manifestation of underly- ing sebaceous carcinoma. Br J Dermatol 2007;156:180-182....