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Long-term Prognosis after Treatment of Submucosal Deep Invasive(T1b)Colorectal Carcinoma Shiro Oka 1 , Shinji Tanaka 1 , Naoki Asayama 2 , Yuzuru Tamaru 2 , Yuki Ninomiya 2 , Kenjiro Shigita 2 , Nana Hayashi 2 , Kazuaki Chayama 2 1Department of Endoscopy, Hiroshima University Hospital, Hiroshima, Japan 2Department of Gastroenterology and Metabolism, Hiroshima University Hospital, Hiroshima, Japan Keyword: 大腸T1b癌 , 視鏡的摘除 , 再発 , 大腸癌治療ガイドライン pp.413-424
Published Date 2015/4/25
DOI https://doi.org/10.11477/mf.1403200208
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 Long-term outcomes in patients with submucosal deep invasive(T1b)colorectal carcinoma(CRC)who underwent endoscopic resection(ER)or surgical resection in accordance with the Japanese Society for Cancer of the Colon and Rectum(JSCCR)guideline are unclear. We examined 139 patients with T1b CRC who underwent ER from January 1992 to August 2010 at Hiroshima University Hospital. The patients were divided into one of the following three groups: ER alone(41 patients), ER plus additional surgery(98 patients), and surgery alone(88 patients).[Remark 1]The recurrence and 5-year disease-free survival rates in the ER alone, ER plus additional surgery, and surgery alone groups were 2.4% and 84.0%, 7.1% and 94.7%, and 4.5% and 96.1%, respectively. As indicated from the results, there were no significant differences in the recurrence and 5-year disease-free survival rates among the different treatment methods. There was no disease-related death among patients who had no risk factor of lymph node metastasis, except for a>1,000-μm invasion depth according to the JSCCR guidelines. Furthermore, ER of T1b CRC did not worsen the surgical and oncological outcomes in cases that required subsequent surgery. Lymph node metastasis also occurred in patients with T1b CRC who underwent surgery.


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

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