aseptic bone necrosis


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aseptic bone necrosis

a type of bone and joint damage that may occur in people who repeatedly breathe compressed air, as in diving or tunneling occupations. The condition apparently results from occlusion of small arteries in the bone by nitrogen bubbles, followed by infarction of bone tissue. It may also occur in patients taking corticosteroids. The condition may be asymptomatic or, if joint surfaces are involved, marked by severe pain and joint collapse. It may also be associated with an injury to the joint. It typically occurs in the femoral head. Also known as avascular necrosis (AVN). See also coagulation necrosis.
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