Idiopathic Osteonecrosis

Idiopathic osteonecrosis of the humeral capitellum.

We present a case of idiopathic osteonecrosis of the humeral capitellum in a 44-year-old female in the absence of any associated risk factors. Arthroscopy was undertaken to remove the loose bodies and debride the capitellum, with a satisfactory outcome.

Idiopathic osteonecrosis of the hip in twins.

Idiopathic osteonecrosis of the hip in twins The pathogenesis of osteonecrosis is not completely understood.' 3 Circulatory impairment leading to bone necrosis is one of the principal features. Many clinical disorders have been associated with osteonecrosis but in most cases a specific pathogenic mechanism remains unclear. Several mechanisms may explain the interruption of the blood supply such...

Idiopathic osteonecrosis of femur in adult Morquio type B disease.

iNOS expression and osteocyte apoptosis in idiopathic, non-traumatic osteonecrosis

BACKGROUND AND PURPOSE Non-traumatic osteonecrosis is a progressive disease with multiple etiologies. It affects younger individuals more and more, often leading to total hip arthroplasty. We investigated whether there is a correlation between inducible nitric oxide synthase (iNOS) expression and osteocyte apoptosis in non-traumatic osteonecrosis. PATIENTS AND METHODS We collected and studied...

Nationwide Epidemiologic Survey of Idiopathic Osteonecrosis of the Femoral Head

BACKGROUND Although numerous studies describe the clinical characteristics of idiopathic osteonecrosis of the femoral head (ONFH) in specific study populations, these have not been confirmed in countrywide studies. QUESTIONS/PURPOSES We therefore determined: (1) the annual number of patients seeking medical care and number of patients newly diagnosed; and (2) the distribution of the age and g...