Arthroscopy Unit, Orthopedic Department, Assiut University Hospital, PO Box 110, Assiut, 71111, Egypt.
Knee Surg Sports Traumatol Arthrosc. 2011 May;19(5):823-5. doi: 10.1007/s00167-010-1283-1. Epub 2010 Oct 16.
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.
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.
Arthroscopic removal and synovectomy were done by a 4-portal technique. The patient went on to complete recovery.
Multidetector CT has proven very useful in identifying wooden foreign bodies, their size and location.
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。
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。
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。
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。
