Rectosacral distance and rectal size in ulcerative colitis.
D000328:Adult; D000886:Anthropometry; D003093:Colitis, Ulcerative / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012007:Rectum / Q000033:anatomy & histology*; D012447:Sacrum / Q000033:anatomy & histology*