system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Air in the biliary tract is seen in all except –
assistant
The correct answer is  Gallstone ileus, carcinoma gall bladder and endoscopic papillotomy can cause pneumobilia (air in biliary tract)
Ascending cholangitis (not sclerosing cholangitis) can cause pneumobilia.