Zhou Jie, Teng Xiaodong
Department of Pathology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China.
Oncol Lett. 2014 May;7(5):1661-1664. doi: 10.3892/ol.2014.1933. Epub 2014 Mar 4.
Three cases of incidental carcinoid tumors have been identified in the surgical margin of rectal adenocarcinoma resection specimens. In all cases the rectal carcinoids exhibited low-risk features, such as a tumor size <10 mm, no muscularis propria invasion and no lymph node involvement. No further excision was conducted and the three cases were followed up for 38, 26 and 14 months, respectively. No regional or distant rectal carcinoid recurrence was identified. Occasionally this is inevitable in order to achieve a positive resection margin for the microcarcinoid during the surgical treatment of another malignancy. However, such carcinoids are usually low-risk and behave less aggressively than same-site adenocarcinomas. Thus, it appears reasonable to avoid further excision in patients who are undergoing a rectal adenocarcinoma resection that exhibits a positive margin for low-risk carcinoid tumor.
在直肠腺癌切除标本的手术切缘中发现了3例偶然的类癌肿瘤。在所有病例中，直肠类癌均表现出低风险特征，如肿瘤大小<10 mm、无固有肌层侵犯且无淋巴结受累。未进行进一步切除，3例患者分别随访了38、26和14个月。未发现局部或远处直肠类癌复发。在手术治疗另一种恶性肿瘤时，为了使微小类癌的手术切缘为阳性，这种情况偶尔是不可避免的。然而，此类类癌通常风险较低，其侵袭性低于同部位腺癌。因此，对于在直肠腺癌切除术中低风险类癌肿瘤切缘为阳性的患者，避免进一步切除似乎是合理的。
