Also known as "acute<unk> " or simply<unk> "
Requires the presence of biliary obstruction and infected biliary tract
Gallstones are classified as cholesterol stones and pigmented stones (black and brown), and are present in approx 20% of females and 8% of males in the United States
These stones cause the majority of all biliary tract problems, and depending on where the stone become impacted, specific problems occur.
Bile flows out the gallbladder, down the cystic duct into the common bile duct, and ultimately into the 1st portion of the duodenum.
Symptomatic cholelithiasis (biliary colic)
Choledocholithiasis
Acute calculous cholecystitis<unk> 
Acalculous cholecystitis
Choledocholithiasis
Biliary tract stricture
Compression by malignant disease
Ascending cholangitis
Gallbladder disease
Choledocholithiasis
Symptomatic cholelithiasis 
Acalculous cholecystitis
Acute calculous cholecystitis
Acute cholecystitis
Chronic pancreatitis