<prompt> Commonest cause for moality in Iver levis operations -Pulmonary atelectasisAnastomotic leakThoracic duct fistulaSubdiaphragmatic collection  <response>: Ans is b ie Anastamotic leak Ivor lewis operation - is subtotal esophagectomy done for Ca esophagus in lower third of esophagus. Pa of stomach and esophagus are resected and remnants of both anastomosed. Anastomotic leak is the most logical answer. I have also confirmed it from Senior residents of surgery. 