ABSTRACT
Aneurysmal bone cyst is a benign usually expansile, solitary lytic lesion of bone; with blood filled cystic cavities, which tend to grow eccentrically. Such eccentric growth may, on occasion, attain considerable size before it is clinically recognized, particularly if the tumor arises in a deeply situated bone. Aneurysmal bone cyst of pubis is a rare entity. In the following case report, an aneurysmal bone cyst, originating from the superior pubic ramus, expanded into the groin and first manifested itself as a gradually increasing fullness in groin and pain especially with weight bearing. The size and location of this vascular tumor posed difficulties in treatment. It was managed by curettage with high speed burr and reconstruction of the defect with an iliac crest cancellous bone graft