<unk>  is air in the biliary tree. It is most commonly seen in patients following surgery in which a biliary-enteric anastomosis has been created or a sphincterotomy (sphincter of Oddi) has been performed. Nonsurgical causes of<unk>  are uncommon and are usually indicative of serious disease. Possible nonsurgical causes of<unk>  include infection, neoplasm, biliary-enteric fistula, emphysematous cholecystitis and incompetence of the sphincter of Oddi.
Pneumobilia
Haemobilia
Biliary fistula
Gallbladder volvulus
Hemoperitoneum
Pneumoperitoneum
Ascites
Gallbladder sludge