A few cases of a dermatosis characterized by "music box spine" keratotic papules limited to the palms and soles have been reported. There have been several names for this dermatosis The Most commonly incorporated term is porokeratosis, but Osman et at suggested the name "spiny keratoderma of palms and soles" because the clinical, histologic and electron microscopic features of this lesion are distinct from porokeratosis. We report a case of spiny keratoderma on the digit showing a single lesion, as a variant of the classic spiny keratoderma of palms and soles.