• Idiopathic: arising spontaneously or from an obscure or unknown cause
• Rectoscope: Proctoscopy is a common medical procedure in which an instrument called a proctoscope (rectoscope)
• Endoscope:An instrument for examining visually the interior of a bodily canal or hollow organ such as the colon, bladder, or stomach
• Ulcerative colitis: a disease of colon (the largest portion of the intestine) characterized by ulcers.
• Crohn's disease: A type of inflammatory bowel disease causing abdominal pain, diarrhea, vomiting and weight loss
• Immune system disorders cause abnormally low activity or over activity of the immune system.