41. It is characterized by inflammation, fibrosis, destruction of the biliary tree and biliary cirrhosis. 42. It is characterized by inflammation, fibrosis, destruction of the biliary tree and biliary cirrhosis. 43. If the patient is thought to have biliary cryptosporidiosis, then an appropriate diagnostic technique is ultrasonography. 44. High levels of gamma-glutamyl transferase ( GGT ) help in diagnosing pathologies involving biliary obstruction. 45. Additionally, self expanding metal stents can be placed across malignant biliary strictures to allow palliative drainage. 46. Surgery is indicated when TAE has failed or sepsis present in biliary tree or drainage has failed. 47. Specialized transporters return excess unstored copper to the liver for additional storage and / or biliary excretion. 48. It is due to the transfer of air from bowel through the fistula into the biliary tract. 49. In addition, swelling of cells and oedema due to inflammation cause mechanical obstruction of intrahepatic biliary tree. 50. This conjugated bilirubin is excreted from the liver into the biliary and cystic ducts as part of bile.