23. Multi-site avascular necrosis of idiopathic aetiology

Idiopathic avascular necrosis of the scaphoid.

Idiopathic avascular necrosis of the scaphoid is a rare condition. A review of the literature shows a variety of conditions labelled as spontaneous avascular necrosis or Preiser's disease. In this paper we report on a study of eight patients with idiopathic avascular necrosis affecting only the proximal pole of the scaphoid. Seven of these patients had positive ulnar variance. The possible aeti...

Avascular Necrosis of the Scaphoid Preiser Disease

No consensus regarding optimal treatment or etiology of Preiser disease exists. We described the epidemiology,classification and treatment characteristics of 18 patients with Preiser disease. Patients with changes related to previoustrauma, and without radiographs were excluded. Based on the radiographs at diagnosis, we classified 13 scaphoids asHerbert Lanzetta stage II, four...

Avascular necrosis of talus simulating juvenile idiopathic arthritis

Avascular necrosis after fracture of the talus is well recognized, but is very rare in children. We report a case of avascular necrosis of the talus simulating juvenile idiopathic arthritis. The diagnosis was confirmed by open biopsy, and non-operative treatment was performed. The patient was asymptomatic with full range of motion postoperatively for two years. We hypothesize that avascular nec...

Avascular Necrosis of the Femoral Head: Are Any Genes Involved?

Avascular necrosis of the femoral head (ANFH) is a pathologic process that results from interruption of blood supply to the femur bone resulting in the death of bone cells and collapse of the femoral head. Nontraumatic ANFH continuesto be a significant challenge to orthopedic surgeons. While the exact mechanisms remain elusive, many new insights have emerged from research in the last decade tha...

Avascular Necrosis of the Capitate