Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla Ƙungiyar sigmoid (ƙungiyar pelvic; sigmoid flexure) ita ce ɓangaren babban hanji wanda ya fi kusa da rectum da anus.
Tabbas, wani nau'i mai rikitarwa na jumla shi ne "The sigmoid colon ( pelvic colon; sigmoid flexure) ya zama madauki wanda ke da kimanin 40 cm. a tsawon, kuma yana cikin pelvis, amma saboda 'yancin motsi yana iya zama a cikin rami na ciki. "