A CASE OF SCHAWANNOMA ARISING IN THE ILIOPSOAS MUSCLE

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  • 腸腰筋内に発生した神経鞘腫の１例

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Abstract

A 60-year-old woman was seen at the hospital because of epigastric pain and dullness of the left lower extremity. Abdominal ultrasonography showed a tumor with a cyst in its inner part in the inside of the left kidney. Abdominal CT scan visualized a well-defined tumor with heterogeneous inner part in the left iliopsoas muscle. Magnetic resonance imaging scan revealed high signal intensity on T2-weighted images. Blood level of NSE was high. Accordingly, we considered a neurogenic tumor, especially a schwannoma, and removed the tumor. The excised tumor was 7×5×5 cm in dimension and elastic-soft, with a yellowish white surface. Histopathological diagnosis was benign schwannoma arising in the left iliopsoas muscle. The postoperative course was uneventful. No signs of recurrence and complications such as parethesia of the lower extremity have been seen as of one year after the operation.<br>Schwannoma originated in the iliopsoas muscle is a rare entity and this is the 11th case in Japan as far as we could review.

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