While<unk> s can frequently pass through the<unk> <unk> <unk>  into the duodenum, some<unk> s may be too large to pass through the<unk> <unk> <unk>  and may cause an obstruction. One risk factor for this is duodenal diverticulum.
Common bile duct stone
Hepatolithiasis
Biliary pseudolithiasis
Porcelain gallbladder
Gallbladder polyp
Biliary microlithiasis
Cholesterolosis of gallbladder
Biliary sludge