Intraosseous Calcaneal Lipoma

A 32-year-old Cambodian male presented with intermittent right ankle pain without history of trauma. Physical examination revealed normal configuration without swelling, mild tenderness at anterolateral and anterior (A). Lateral view of right ankle radiograph demonstrated a well-defined osteolytic lesion at right calcaneal neck to body, with thin D E sclerotic rim, containing focal internal dystrophic calcification, without adjacent cortical breakthrough (B). There is a diffuse fat density in the lesion on non-contrast computed tomography (CT) (C), corresponding to additional magnetic resonance imaging (MRI) findings; bright T1W signal (D) with signal drop on fat suppression sequence, and small surrounding vascularity (E). Intraosseous calcaneal lipoma was diagnosed.