Waihangahia he putanga matatini ake o tenei rerenga Ko te colon sigmoid (colon pelvic; flexure sigmoid) te waahanga o te puku nui e tata ana ki te rectum me te anus.
Ko te tikanga, ko te putanga matatini ake o te rerenga korero ko "Ko te colon sigmoid ( colon pelvic; flexure sigmoid) e hanga ana i te porohita e tata ana ki te 40 cm. te roa, a ko te tikanga kei roto i te pelvis, engari na te mea o te herekore o te nekehanga ka taea te neke ki roto i te puku o te kopu. "