The normal gallbladder wall should be thin, measuring no more than 3 mm in thickness when well distended.
Thickening of the gallbladder wall is seen in many pathologic conditions, including primary gallbladder disorders (e.g., acute and chronic cholecystitis, carcinoma, adenomyomatosis), systemic conditions (e.g., hepatic, cardiac, or renal failure; hypoproteinemia), infections, such as infectious mononucleosis or opportunistic infections in the patient with acquired immunodeficiency syndrome (AIDS), and extracholecystic inflammation such as with acute hepatitis, pancreatitis, or pyelonephritis.
Biliary System Axial 2
Classically, the left and right hepatic ducts merge to form the common hepatic duct just anterior to the extrahepatic portal vein within a sheath that is continuous with the hepatoduodenal ligament.
Biliary System Axial 3
The cystic duct drains into the common hepatic duct to form the common bile duct.
Biliary System Axial 4
The main pancreatic duct normally measures 2 to 3 mm in diameter at ages 30 to 50, which may increase to an average 4.5 mm at 70 to 90 years.