Osteonecrosis is a condition in which part of a bone dies because of the interruption of its blood supply. What is the most common cause of osteonecrosis other than fracture?
A. vessel injury
B. prior steroid therapy
C. radiation therapy
D. embolism
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A 6-year old child as developed idiopathic osteonecrosis disease from the proximal (capital) femoral epiphysis. The health care provider would recognize this as:
A. blout disease
B. sever disease
C. legg-calve-perthes disease
D. osgood-schlatter disease
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