Aneurysmal bone cyst of the fibula.

Aneurysmal bone cysts are benign, expansile lesions that are not at all uncommon in the lower extremity. These lesions are difficult to recognize clinically. This paper is a thorough review of the current literature regarding aneurysmal bone cysts. After this review, one should be able to diagnose and appropriately treat aneurysmal bone cysts. Also provided is a case report with classic histologic, clinical, and radiographic findings that was treated by en bloc resection.