Plantar Cornu Cutaneum Associated with Cutaneous Myxoma

Abstract

Cutaneous horns are rare in black patients probably as a result of the rarity of sun induced associated skin lesions. However reports of these lesions are filtering in from Africa. In this paper we report an unusual case on the sole of the foot in a native African from Nigeria. This is probably the first documentation of the lesion on the sole of the foot in the world literature.

Cutaneous horns in an African population

“…Cutaneous horns have been associated with several more common benign lesions such as angiokeratoma, angioma, benign lichenoid sclerosis, dermatofibroma, discoid lupus, epidermal nevus, keratoacanthoma, granular cell tumor, pyogenic granuloma, sebaceous adenoma, seborrheic keratosis, trichilemmoma, cutaneous myxoma, inverted follicular keratosis, and infective skin conditions like the verruca vulgaris, pyogenic grannuloma, molluscum contagiosum of the pox virus, and cutaneous leishmaniasis. [ 6 7 13 14 ] Although no histologic description of a specific infective condition was reported in any of our patients, there were descriptions of subepidermal chronic inflammatory infiltrates mainly of lymphocytes and macrophages in two. This however does not necessarily imply an infective origin.…”

“…[ 4 ] While probably not as rare in blacks as thought, the only case reported so far from Nigeria, in the English literature, was of a female farmer who had this lesion on the sole of the foot and was related to a cutaneous myxoma. [ 7 ] Since then, five additional cases have presented to the author in the plastic surgery services of the University of Benin Teaching Hospital, Benin City. These form the basis of this report, to draw attention to a probably neglected entity.…”