<prompt> The commonest cause for moality in Iver levis operations -Pulmonary atelectasisAnastomotic leakThoracic duct fistulaSubdiaphragmatic collection  <response>: Ivor Lewis operation - is subtotal esophagectomy done for Ca esophagus in the 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. Ref : Bailey love, 25e p1033 