Posters— Surgical Treatment of Sarcomas

OSTEOCHONDROMA OF THE FEMORAL NECK

Siebenrock KA, Ganz R (Orthopaedic Surgery, University of Berne, 3010 Berne, Switzerland)

Osteochondromas of the femoral neck represent rare intraarticular lesions. The difficulty to obtain adequate surgical access especially when located at the inferior and posterior femoral neck has been expressed already in the literature. The authors have approached these lesions with a new, versatile approach which offers the advantage of complete tumor visualization, circumferential access to the femoral neck combined with the possibility of entire hip joint inspection and intraoperative control of adequate tumor resection. The surgical approach includes a digastric trochanteric osteotomy and subluxation or even dislocation of the femoral head thereby respecting the crucial blood supply to the femoral head. This approach has been used in 4 patients with osteochondroma of the femoral neck presenting with pain, restricted range of motion and limping. Femoro-acetabular impingement of the bulky osteochondroma against the acetabular rim could be verified in all cases. In 2 patients labral lesions were found at the impingement site. All 4 patients had complete or significant relief of symptoms at a mean follow-up of 34 months (18 – 48 months) without signs of progressive osteoarthritis or avascular necrosis.