[Bilateral avascular necrosis of the femur head in an HIV-positive male].

We present a case of bilateral avascular necrosis at the hips of a HIV-positive male, without other predisposing antecedents. The only relevant analytic data was the positivity of anticardiolipin antibodies (aCL AB). We discuss the possibility that both in this case as in those previously described, HIV may have played a main role in the development of osteonecrosis.

[Pyomyositis caused by Staphylococcus aureus].

Background: An evaluation of the clinical characteristics and profitability of the diagnostic methods of myositis by Staphylococcus aureus was undertaken in favor of earlier diagnosis and treatment.

Methods: Twenty-eight cases of pyomyositis by S. aureus attended over the last nine years were studied.