NCIt definition : The fourth portion of the large intestine (colon) that communicates with the transverse
colon in the left-upper quadrant of the abdomen and the rectum below.;
Alternative definition : CDISC: The fourth portion of the large intestine (colon) that communicates with the
transverse colon in the left-upper quadrant of the abdomen and the rectum below. (NCI); UBERON: The portion of the colon between the left colic flexure and the sigmoid colon
at the pelvic brim; the portion of the descending colon lying in the left iliac fossa
is sometimes called the iliac colon.;