<prompt> Answer this question truthfullyWhat is the likely cause of a high hourly output of milky grey-white fluid with a sheen on the bulb drain following pancreatic head resection for cancer?  <response>: <reason> What is the likely cause of a high hourly output of milky grey-white fluid with a sheen on the bulb drain following pancreatic head resection for cancer? It is likely a pancreatic leak. 