It may be used to help find cancers in the prostate, since tumors often have more blood flow than normal tissue.
See also prostate, transrectal ultrasound, ultrasound. testing done to find abnormalities early, before signs and symptoms start.
Sometimes a small pouch is made to take the place of the rectum, by doubling back a short segment of colon (colonic J-pouch) or enlarging a segment (coloplasty).
A temporary colostomy is needed while the pouch heals. It is divided into 4 sections, starting with the ascending, transverse, descending, and ending with the sigmoid colon.
See also screening, barium enema, colonoscopy, fecal occult blood test, fecal immunochemical test, polyp, sigmoidoscopy.