simple cyst LSBU

Description: Radiology case 4642-3181 20 year old woman with sudden onset of pain in the right ankle, which prevented her from standing on that leg.
Lateral and oblique views show an area of low bone density in the calcaneum, greater and denser than the normal variant. It has a sclerotic, well-defined and narrow zone of transition between the lesion and normal bone. The bone defect is better shown in the oblique view and both views show its complete dense bone margin. The visible joint margins are intact with no indication of arthropathy.