Atypical location of acquired digital fibrokeratoma

Acquired digital fibrokeratoma is a rare, benign, fibroepithelial tumor, which commonly presents as a finger-shaped normochromic nodule, typically located at the extremities. When affecting the nails, it usually emanates from the proximal nail fold, rarely arising from the matrix or nail bed. In this report, we describe an unusual case of acquired digital fibrokeratoma located under the nail plate of the right thumb. We describe the clinical, dermoscopic, and histopathological aspects of the lesion, as well as the surgical treatment used, and present a brief literature review on the subject.

Keywords: Nail Diseases; Fibroma; Nails; Skin Neoplasms