Miyanishi Keita, Hara Toshihiko, Kaminomachi Shigekazu, Maeda Hiroki, Watanabe Hideyuki, Torisu Takehiko
Department of Orthopaedic Surgery, Kyushu Rosai Hospital, 1-3-1 Kuzuharatakamatsu, Kokuraminami-ku, Kitakyushu 800-0296, Japan.
Arch Orthop Trauma Surg. 2009 May;129(5):583-9. doi: 10.1007/s00402-008-0642-6. Epub 2008 Apr 30.
Subchondral insufficiency fracture of the femoral head (SIF) may be confused with osteonecrosis of the femoral head (ON) due to clinical and imaging similarities.
Contrast-enhanced MR images in patients with SIF (ten hips in ten patients) were retrospectively reviewed and compared with those from patients with ON (ten hips in six patients).
Low-signal intensity bands on T1-weighted images were present within the femoral head in all hips examined. The segment proximal to the band was contrast-enhanced following IV gadolinium administration in nine of ten hips (90%) with SIF and in none of the 10 hips with ON.
These results suggest that the presence of contrast enhancement in the segment proximal to the low-signal intensity band in the femoral head may serve as a supplemental diagnostic measure for the differentiation of SIF from ON.
由于临床和影像学表现相似，股骨头软骨下不全骨折（SIF）可能会与股骨头坏死（ON）相混淆。
回顾性分析SIF患者（10例患者的10个髋关节）的对比增强磁共振成像，并与ON患者（6例患者的10个髋关节）的成像进行比较。
所有检查的髋关节中，股骨头在T1加权图像上均出现低信号带。在10例SIF患者的10个髋关节中有9个（90%）在静脉注射钆后，低信号带近端的节段出现对比增强，而10例ON患者的髋关节均未出现。
这些结果表明，股骨头低信号带近端节段出现对比增强可作为区分SIF与ON的补充诊断方法。
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