A case of surgical complete transanal resection of rectal gastrointestinal stromal tumor diagnosed by endoscopic ultrasonography and endoscopic ultrasonography-guided fine needle aspiration

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Abstract

A 58-year-old Japanese man underwent colonoscopy. We identified a protruding submucosal tumor covered with normal mucosa to the level of the rectal ampullary lesion. The patient underwent convex endoscopic ultrasonography (EUS) and endoscopic ultrasonography-guided fine needle aspiration (EUS-FNA). EUS showed a hypoechoic mass with homogeneous internal echoes and regular margins. The lesion was contiguous with the fourth layer of the rectal wall. The histological specimen from EUS-FNA identified spindle cells. The immunohistochemical profile of the spindle cell tumor was as follows: c-kit+, s-100-, desmin-, and smooth muscle antigen-. We completed surgical resection using the transanal route. The final diagnosis was rectal gastrointestinal stromal tumor.

Journal

  • Choonpa Igaku

    Choonpa Igaku 46(1), 71-75, 2019

    The Japan Society of Ultrasonics in Medicine

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