结直肠肛门外科2026，Vol.32Issue(1)：26-31,36,7.DOI:10.19668/j.cnki.issn1674-0491.2026.01.004
直肠癌分界、分段与分期的磁共振成像解剖学思考
Anatomical considerations on the boundary,segmentation,and staging of the rectal cancer using magnetic resonance imaging
曹绍东 1王一民 2孙凌宇2
作者信息
- 1. 哈尔滨医科大学附属第四医院影像科 黑龙江 哈尔滨 150000
- 2. 哈尔滨医科大学附属第四医院肿瘤外科肝胆外科 黑龙江 哈尔滨 150000
- 折叠
摘要
Abstract
In recent years,magnetic resonance imaging(MRI)has achieved significant breakthroughs in both clinical ex-amination performance and image interpretation for locally advanced rectal cancer.However,several challenges remain re-garding the ambiguous definition of anatomical details.Unifying the standards for rectal boundary,rectal segmentation,and tumor staging is of clinical practice importance to promote standardized clinical research and optimize individualized treatment decisions in rectal cancer.Currently,the international imaging community has largely reached a consensus on defining the upper border of the rectum,unanimously adopting the"sigmoid take-off"as the anatomical landmark.Mean-while,in the field of surgery,the anorectal junction or the anal verge is clearly recognized as the reference standard for the lower border of the rectum.Regarding the segmentation of the rectum between the anorectal junction and the sig-moid take-off,different standards should be adopted based on specific clinical needs.From the perspective of preopera-tive neoadjuvant treatment strategy,the peritoneal reflection is recommended as the anatomical landmark to divide the rectum into the upper and lower segments.When focusing on the selection of surgical procedures,segmentation based on a distance of 5 cm from the lower tumor margin to the anorectal junction is suggested,as this criterion better aligns with the practical requirements of surgical decision-making.关键词
直肠癌/磁共振成像/分期/乙状结肠起始点/前腹膜反折/肛管Key words
rectal cancer/magnetic resonance imaging/staging/sigmoid take-off/anterior peritoneal reflection/anal canal分类
医药卫生引用本文复制引用
曹绍东,王一民,孙凌宇..直肠癌分界、分段与分期的磁共振成像解剖学思考[J].结直肠肛门外科,2026,32(1):26-31,36,7.
