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Osteonecrosis of the femoral head Saya Horiuchi 1 1Radiology Department St. Luke’s International Hospital Keyword: 特発性大腿骨頭壊死症 , 軟骨下脆弱性骨折 , 一過性大腿骨頭萎縮症 pp.757-764
Published Date 2023/8/10
DOI https://doi.org/10.18888/rp.0000002416
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Osteonecrosis most commonly affects the femoral head. The condition is labeled “idiopathic” when the cause is unknown. Risk factors associated with the disease include chronic steroid use, alcohol abuse, and certain medical conditions, such as lupus. MRI is highly sensitive and is often the preferred method for early detection. A key indicator of osteonecrosis, the “double-line sign,” appears on T2-weighted images as two distinct lines:a bright inner line and a dark outer line. Insufficiency fracture of the femoral head is one of the most important differential diagnoses for femoral head osteonecrosis.


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