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A Case of Cancer in SSL(pT1a) Haruka Yorozu 1 , Hiro-o Matsushita 1 , Kenjiro Yoshikawa 1 , Takaya Edagawa 1 , Jo Ueda 1 , Hiroki Koshiishi 1 , Takuo Tokairin 2 , Katsuhiko Enomoto 2 1Department of Gastroenterology, Akita Red Cross Hospital 2Division of Diagnostic Pathology, Akita Red Cross Hospital Keyword: 大腸鋸歯状病変 , SSL , SSL由来癌 , SSL+T1a癌 , 粘膜下層浸潤 pp.585-589
Published Date 2026/4/25
DOI https://doi.org/10.11477/mf.053621800610040585
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 A female patient in her 60s underwent a routine screening colonoscopy, during which a 25mm lesion was found in the cecum. The lesion had a flat part and a nodular part.

 The flat part showed NBI classification of JNET Type 1, and magnified chromoendoscopy revealed Type II-O(open-shape)and II-L(long)pit patterns. The small nodular part was located at the margin of the flat area, and this nodule showed JNET Type 2B NBI classification, with magnified chromoendoscopy revealing a Type VI pit pattern. These findings suggested a sessile serrated lesion(SSL)with a cancerous part, whose estimated invasion depth was to be confined to the mucosa(SSLD, cTis). Endoscopic submucosal dissection(ESD)was performed for complete lesion resection. The pathological diagnosis was a well-differentiated adenocarcinoma(tub1)in an SSL, staged as pT1a with submucosal invasion of 850μm, Ly0, V0, BD1, HM0, and VM0.


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電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院

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