<prompt> The impoant symptom of radiation proctitis is:Bleeding PRWeight lossLoss of weightColicky abdominal pain  <response>: Radiation proctitis can lead to persistent rectal bleeding and iron deficiency anemia. Other symptoms include diarrhea, mucoid discharge, urgency, tenesmus, rectal pain and fecal incontinence. Ref: World J Gastroenterol 2011 November 7; 1741: 4554-4562. 