By Gary M. White, MD
The onychopapilloma is an uncommon but benign growth of the nail root or bed.
The onychopapilloma most commonly presents as longitudinal erythronychia, but also may present as longitudinal leukonychia, longitudinal melanonychia, splinter hemorrhage(s), or as a distal V-shaped onycholysis. Dermoscopy of the free edge of the nail plate shows a small subungual keratotic mass. Histologically, there is nail matrix metaplasia with marked papillomatosis.
None is needed. Surgery may be done.
A ridge runs longitudinally and a keratotic tubular growth extends out from the nail bed.
Erythronychia representing onychopapilloma. Courtesy of Julie Minocha, MD
Surgery for onychopapilloma. JAAD January 2011 Volume 64, Issue 1, Pages 167.e1–167.e11
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