<prompt> True regarding colovesical fistulaMost commonly presents with pneumaturiaMost commonly caused by colonic cancerMore common in femalesReadily diagnosed on barium enema  <response>: . Left sided growth presents with colicky pain, altered bowel habits alternating constipation and diarrhoea, palpable lump, distension of abdomen due subacute chronic obstruction. Later may present like complete colonic obstruction. Tenesmus, with passage of blood and mucus, with alternate constipation and diarrhoea, is common. Bladder symptoms may warn colovesical fistula. ref:SRB;s manual of surgery ,ed 3,pg no 838 