A case of a cutaneous horn with Kaposi's sarcoma at its base is described. The patient, in addition, had a "corn" of the foot which proved to be of similar nature. A verrucous lesion of the chin was probably an expression also of the same disease.
Gibbs RC, Hyman AB. Kaposi's Sarcoma at the Base of Cutaneous Horn. Arch Dermatol. 1968;98(1):37-40. doi:10.1001/archderm.1968.01610130043009