Hidden Unicameral Bone Cyst of the Calcaneus: A Case Report of Military Soldier with Chronic Ankle Pain

Bone cysts are benign bone lesions that are quite uncommon in the calcaneus. Calcaneal cysts generally remain asymptomatic in most patients and are discovered incidentally but in some, they may cause localized bone pain that is progressive in intensity. If not picked on the conventional radiographs, the diagnosis is delayed and the patient remains distressed and dispirited. We, here, report a military soldier with calcaneal cyst who remained misdiagnosed for six months and had been treated as a case of ankle sprain. After correct diagnosis, his problems were finally settled following surgical intervention. The physicians should keep a high degree of suspicion of an alternative diagnosis in all cases where usual management is not beneficial in commonly expected pathologies.