Biliary sludge
| Biliary sludge | |
|---|---|
| Other names | Gallbladder sludge, Microcrystalline disease, Biliary sediment, Thick bile, Biliary sand, biliary gravel | 
| Abdominal ultrasonography showing biliary sludge and gallstones | |
| Specialty | Gastroenterology | 
Biliary sludge refers to a viscous mixture of small particles derived from bile. These sediments consist of cholesterol crystals, calcium salts, calcium bilirubinate, mucin, and other materials.