Surgical hip dislocation for treatment of primary aneurysmal bone cysts in the femoral neck and head

摘要

INTRODUCTION: Aneurysmal bone cyst (ABC) is a benign lesion of the bone, composed of blood-filled spaces separated by connective tissue septa. It contains fibroblast and osteoclast-type giant cells and reactive bone tissue. ABC can exist either as a primary bone lesion (about 70% of patients) or as a secondary lesion in which a preexisting bone lesion usually is identified (about 30% of patients). It is a rare lesion with a prevalence of 0.14 per 100,000 and most commonly occurs during the second decade of life. The reported male to female ratio is 2:1. In a study of 411 children with ABC the most common locations were the femur (22%), the tibia (17%), the spine (15%), the humerus (10%), the pelvis (9%) and the fibula (9%).3 A number of surgical techniques have been described to treat ABC. Traditional methods include curettage, resection, intracystic injections and embolization. Treatment choice is controversial and dependent on cyst size, location and the patient's age.