Infected Intraosseous Epidermoid Cyst in the Right Ankle: A Case Report

This case report describes a 61-year-old male with an infected intraosseous epidermoid cyst in the right ankle, a rare occurrence for such cysts typically found in subcutaneous tissues. The patient initially presented with a painless swelling that became painful and inflamed, discharging purulent material. Diagnostic imaging suggested an infected ganglion or tumorous cyst, and laboratory tests showed mild leukocytosis and elevated inflammatory markers. After unsuccessful drainage, surgical excision revealed a 7×5×2.4 cm cystic mass, confirmed as an epidermoid inclusion cyst through histopathological examination. The patient recovered uneventfully with no recurrence of symptoms.