Avascular necrosis (AN) is the death of trabecular bone and marrow, and is primarily observed in femur head. The pathogenesis is believed to be caused by the ischemia that occurs with the deterioration of micro-circulation in the femoral head.17 The annual US incidence of AN is between 10,000 and 15,000. The disease most commonly emerges in young adults, with an average age of 38 years. Prognos...

Transepiphyseal separation of the neck of the femur following grand mal seizures is described in two children with cerebral palsy. Closed reduction and percutaneous fixation was followed by a period in a hip spica. Although the incidence of avascular necrosis of the femoral head is high following such injury, this has not occurred in these patients at a follow-up of 18 months.

According to Ambroise Pare, “there is this danger in the dislocation of the hip, that either the bone cannot be put into the place again, at least unless with much trouble, or else, being put in, that it will presently fall out again.” These difficulties have been largely overcome, only to be replaced by the problem of avascular necrosis. Mason (1954) reported one case of traumatic dislocation ...

BACKGROUND Prognosis of traumatic osteonecrosis of femoral head in children is poor for either conservative treatment or surgical intervention. Intravenous bisphosphonate is an expecting medication to reduce femoral head resorption and to prevent femoral head collapse after traumatic osteonecrosis. This mechanism will reduce development of osteoarthritis and disability in the future. OBJECTIV...

Fewer than 20 cases of adventitial cystic disease of the vein have been reported in the worldwide literature. This small number of reported cases may be due not only to the disease's low incidence, but also to the difficulty in making the proper diagnosis. Many techniques have been used to investigate this disease, but venography has been the traditional diagnostic tool. In this report we prese...

The extent of necrosis is the main determining factor in the outcome of osteonecrosis of the femoral head and is best measured by MRI. Using statistical analyses, we have evaluated the accuracy and repeatability of seven different methods of measuring the extent of necrosis, of which three demonstrate good or acceptable accuracy. For the general observer their repeatability is poor; only for ex...

Cover Picture: Radiograph at six months after internal fixation of the fracture. The Austin-Moore’s pins had crossed the epiphyseal line at the time of the operation. The fracture line is still visible but the Moore’s pins are still holding the fracture. The avascular necrosis involves the entire femoral head. (Refer to page 205-207) “In its beginning the malady (tuberculosis) is easier to cure...

Of 24 intertrochanteric osteotomies for avascular necrosis of the femoral head, 22 were followed up for an average of 63 months. Sixteen of the 22 cases had good or excellent results, including 5 of the 6 cases with Stage II disease and 11 of the 16 with Stage III changes. Success seemed to be inversely related to the size of the lesion. There were six major orthopaedic complications, but despi...