Smaller rectum: non-specific early sign of lesion.
D003092:Colitis; D003093:Colitis, Ulcerative; D006801:Humans; D012003:Rectal Fistula; D012004:Rectal Neoplasms; D012007:Rectum
COLITIS, ULCERATIVE; RECTAL FISTULA; RECTAL NEOPLASMS; RECTUM