The presence of inflammatory leucocytes in the rectal mucus of patients with regional ileitis.
D003424:Crohn Disease / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D007249:Inflammation; D007962:Leukocytes; D009093:Mucus / Q000166:cytology; D009504:Neutrophils; D012007:Rectum / Q000473:pathology*