Pathological Fracture due to the Aneurysmal Bone Cyst Involving a Large Segment of Radius Diaphysis in an Adolescent

Abstract

A cystic lesion of the long bones occasionally presents with a pathological fracture. Various etiologies are described, and the aneurysmal bone cyst (ABC) is an uncommon lesion in the forearm bones. Usually, ABC involves the metaphyseal region as an eccentric expansile lesion and its presence in diaphysis is rare. Involvement of a large segment of a long bone is a very uncommon presentation for any cystic lesion including ABC. Fracture resulting in the settings of ABC with an extensive diaphyseal involvement is a rare and challenging presentation. We describe relevant details pertaining to a case of a 13-year-old female involving a large segment of the radial diaphysis that was managed operatively and finally diagnosed as ABC. She had good outcome in the follow-up of 5 years, and no postoperative complication or recurrence was noted.