OBJECTIVE The pathophysiology of non-traumatic osteonecrosis (ON) or avascular necrosis (AVN) of the femoral head remains poorly understood. Some studies have suggested the contribution of underlying thrombophilia as a mechanism; however, no specific thrombophilic factor has been consistently found in association with the disease. We are presenting data suggesting a role for endothelial cell ac...

Osteonecrosis of the femoral head occurs predominantly in younger patients, and without treatment most of them suffer from collapse of the femoral head and painful arthritis of the hip joint within several years. The ideal goal of early treatment is to delay or arrest the progression of the disease before articular collapse occurs. It has been well documented that without specific treatment app...

BACKGROUND Avascular necrosis after arthroscopic surgery of the knee has already been published. The purpose of this article is to report on the frequently misdiagnosed entity of osteonecrosis of the medial tibial plateau. CASE PRESENTATION Charts and radiographs of a consecutive series with isolated medial tibial plateau osteonecrosis were analyzed. The criterion for inclusion was the absenc...

OBJECTIVE Screening for hip dysplasia is controversial. A previous randomized controlled trial revealed that adding universal or selective ultrasound to routine clinical examination gave a nonsignificant reduction in rates of late presenting cases, but with higher treatment rates. This study assesses differences in outcome at skeletal maturity for the 3 newborn screening strategies in terms of ...

Our understanding of idiopathic necrosis of the femoral head depends upon two fundamental concepts. The first is that a standard radiograph shows only the shadow of the mineralised portion of a bone. The radiographic appearance of living bone is the same as that of dead bone ofEgyptian mummies or prehistoric skeletons. Consequently, bone necrosis has no specific radiographic appearance and a no...

BACKGROUND Conventional technique of valgus osteotomy of the proximal femur involves removal of a partial or full thickness lateral based wedge from the peritrochanteric region. The purpose of this article is to describe a novel technique of valgus subtrochanteric osteotomy for proximal femur nonunion. METHODS 11 patients with proximal femur nonunions {intracapsular fractures--7, extracapsula...