Sonographic Detection of Knee Neurilemmoma: A Case Report and Literature Review

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• 作者：Wen-Hsiu Kuo ; Chueh-Hung Wu ; Tyng-Guey Wang
• 关键词：knee tumor ; neurilemmoma ; sonography
• 刊名：Journal of Medical Ultrasound
• 出版年：2012
• 出版时间：June, 2012
• 年：2012
• 卷：20
• 期：2
• 页码：125-128
• 全文大小：365 K

文摘

Neurilemmomas, although relatively rare, are the most common type of peripheral nerve tumor in adults. This article reports a 52-year-old man with a palpable, painful mass located distal to the popliteal fossa causing intermittent radiating numbness down to the calf and foot for 4 months. Baker¡¯s cyst compressing the posterior tibial nerve or neurogenic tumor was suspected. Sonographic examination revealed a well-defined heterogeneous mass, located within the muscular layer, communicating with the posterior tibial nerve. The pathology was found to be a neurilemmoma. Symptoms of leg pain and numbness resolved after surgical removal of the tumor. The diagnosis of posterior tibial nerve neurilemmoma is often delayed because it is mistaken for Baker¡¯s cyst or lumbosacral radiculopathy. Sonographic examination is useful in the initial assessment, because it helps differentiate the origin and characteristics of a palpable mass.