多排 CT 扫描诊断膝关节异物（木刺）
Multidetector CT for thorn (wooden) foreign bodies of the knee.
机构信息
Arthroscopy Unit, Orthopedic Department, Assiut University Hospital, PO Box 110, Assiut, 71111, Egypt.
出版信息
Knee Surg Sports Traumatol Arthrosc. 2011 May;19(5):823-5. doi: 10.1007/s00167-010-1283-1. Epub 2010 Oct 16.
PURPOSE
Thorn (wooden) foreign bodies of the knee present a challenge in their diagnosis. Partly because of inaccurate history and sometimes a long duration of symptoms, radiographs are negative and MRI may show synovitis without a specific pathology.
METHODS
We report a case of a 16-year-old male patient with a date palm thorn foreign body, which caused septic arthritis. He underwent two open surgeries. Both failed to detect the loose body. An MRI of the knee showed a high signal in the posterolateral compartment; however, the pathology could not be confirmed except by 64 Multidetector CT (MDCT) that clearly identified the thorn and its location.
RESULTS
Arthroscopic removal and synovectomy were done by a 4-portal technique. The patient went on to complete recovery.
CONCLUSION
Multidetector CT has proven very useful in identifying wooden foreign bodies, their size and location.
目的
膝关节木质异物的诊断具有一定挑战性。部分原因是病史不准确，有时症状持续时间长，导致 X 线片呈阴性，而 MRI 可能显示滑膜炎而无特定的病理学表现。
方法
我们报告了 1 例 16 岁男性患者，其因一枚棕榈刺异物导致化脓性关节炎。他接受了两次开放性手术，但均未能发现游离体。膝关节 MRI 显示后外侧间隔高信号；然而，除了 64 排多层 CT（MDCT）外，无法明确病理学诊断，后者可清楚地识别刺及其位置。
结果
采用 4 入路关节镜技术进行异物取出和滑膜切除术。患者最终完全康复。
结论
多排 CT 已被证明在识别木质异物及其大小和位置方面非常有用。
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