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The Journal of Bone & Joint Surgery British Volume
Vol. 85-B, Issue 3 | Pages 462 - 462
1 Apr 2003
KLOEN P LEUNIG M GANZ R


The Journal of Bone & Joint Surgery British Volume
Vol. 84-B, Issue 1 | Pages 66 - 69
1 Jan 2002
Kloen P Leunig M Ganz R

Osteonecrosis of the femoral head can be caused by a variety of disorders and affects the relatively young patient. Most studies have concentrated on the femoral changes; the sites of early lesions of the labrum and acetabular cartilage have not been recorded. We studied 17 hips with osteonecrosis and a wide congruent joint space on radiographs and by direct inspection of the femoral head, labrum and acetabular cartilage during surgery. All of the femoral heads had some anterosuperior flattening which reduced the head-neck ratio in this area. A consistent pattern of damage to the labrum and the acetabular cartilage was seen in all hips. Intraoperatively, impingement and the cam-effect with its spatial correlation with lesions of the labrum and acetabular cartilage were observed. These findings could be helpful when undertaking conservative surgery for osteonecrosis, since the recognition of early radiologically undetectable acetabular lesions may require modification of the surgical technique.


The Journal of Bone & Joint Surgery British Volume
Vol. 80-B, Issue 2 | Pages 298 - 301
1 Mar 1998
Kloen P Keel SB Chandler HP Geiger RH Zarins BE Rosenberg AE

Lipoma arborescens is a rare intra-articular lesion, characterised by diffuse replacement of the subsynovial tissue by mature fat cells, producing prominent villous transformation of the synovium. The aetiology of this benign condition is unknown.

We describe six cases involving the knee discussing the symptoms, diagnosis and treatment.