摘要:
Avascukir necrosis (AVN) of the hip is a process that is characterized pathologically by bone marrow ischemia aiid eventual death of trabecular bone. Ischemic necrosis, osteonecrosis, and aseptic riecrosis are syrzonynzs for the mile disease process. Radiographic nzanifestatioizs ofAVN occur in the late stages of the disease, as the bone attempts to repair itself: As bone repair occurs, weightbearing boiie becomes niechurzically weakened aiid jlattened, and it rnay eveiituallv collapse. Secondarily, this disease leads to debilitrrting pain and osteoarthritis. Earlv dicignosis ofAVN using MRI is inzportant, since the disease occurs in relatively young iridividuals (average age 20 to 50 years for idiopathic forms) and since treatmerit options for more adwinced disease frequently are unsuccessful.The purpose of this lesson is to present the pathophysiology of AVN and to emphasize the use of MRI in diagnosing early AVN of the hip and differentiating it from other bone marrow disorders.
ISSN:0149-9009
出版商:OVID
年代:1996
数据来源: OVID