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Intraosseous Dermoid Cyst of the Proximal Phalanx of a Little Toe: A Case Report

Sebastian Kreuzer, Martin Schober, Rolf Hess, Jan Philipp Gebel

Dermoid cysts are rare benign lesions which are seldom found intraosseous. We describe the case of a 56-y.o. male diabetic with an abscess formation on the dorsum of the foot, between MT4 and MT5 with suspected osteomyelitis of the adjacent phalanx. Surgery for excision of the abscess and amputation of the little toe was performed. Intraoperatively the proximal Phalanx showed an opened intraosseous cyst with squamous cells and specialized skin appendage.
Histopathological the dermoid cyst was confirmed. We would like to showcase this rare incident of an intraosseous dermoid cyst of the proximal phalanx of the little toe.