Indian Dermatology Online Journal | 2019
Subungual Exostosis – Clinical, Radiological, and Histological Findings
Abstract
© 2019 Indian Dermatology Online Journal | Published by Wolters Kluwer Medknow A 35‐year‐old gentleman presented with a slow growing, asymptomatic swelling on the right great toe, and dystrophy of nail plate of 15 years duration. There was no history of prior trauma or chronic infection. The subungual nodule of around 2.5–3 cm in size was well‐defined, bony hard, and was expanding, destroying nail plate, and normal architecture of nail unit. Overlying nail plate was dystrophic [Figure 1]. Radiographs of the foot revealed an outgrowth of trabeculated bone projecting from and in continuity with distal phalanx of great toe on the medial aspect, with intact well‐defined cortical margins. No destructive changes were noted in the distal phalanx [Figure 2]. These radiological findings confirmed the diagnosis of subungual exostosis (SE). Histopathology from the nodule showed deposition of bone tissues in the mid and lower dermis without any accompanying