True about Ogilvie syndrome are all except: (A) It is caused by mechanical obstruction of the colon, (B) It involves entire \/ pa of the large colon, (C) It occurs after previous surgery, (D) It occurs commonly after narcotic use
Answer is A. Ogilvie syndrome is the acute dilation of the colon in the absence of any mechanical obstruction in severely ill patients. Colonic pseudo-obstruction is characterized by massive dilatation of the cecum (diameter > 10 cm) and right colon on abdominal X-ray.