Masaichi Ogawa, Yoichi Tomita, Kazuo Matai, Kohei Ichihara, Takuo Hasegawa and Kazuhiko Yoshida
A 53-year-old woman received a total colonoscopy for a FOBT (Faecal Occult Blood Test) positive and detected a sessile type poly in the sigmoid colon. Colonoscopy exhibited a “somewhat of a white tone” and measured 6 mm sessile type poly, with no irregular pit pattern, and suspected an adenoma. Also, endoscopic mucosal resection was done. The pathological diagnosis was a well differentiated adenocarcinoma and the depth of invasion was 1,200 micron. Submucosal invasive adenocarcinoma with 6 mm, non-depressive sessile type case is very rare. Therefore, one should recommended an endoscopic mucosal resection, not observation, when the endoscopic findings was recognized a “white tone” sessile type polyp.
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