Air in the biliary tract is seen in all except –
Gallstone ileus, carcinoma gall bladder and endoscopic papillotomy can cause pneumobilia (air in biliary tract)
Ascending cholangitis (not sclerosing cholangitis) can cause pneumobilia.
Gall stone ileus
Sclerosing cholangitis
Carcinoma gall bladder
Endoscopic papillotomy