| TABLE 2.
Classification of gallstones |
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Pigment |
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| Cholesterol | Black | Brown | |
| Composition | Cholesterol | Pigment polymer Calcium salts (phosphates, carbonates) |
Calcium bilirubinate Calcium soaps (palmitate, stearate) |
| Consistency | Crystalline | Hard | Soft, greasy |
| Location | Gallbladder +/- common duct |
Gallbladder Bile ducts |
Common duct |
| Radiodensity | Lucent (85%) | Opaque (50%) | Lucent (100%) |
| Clinical associations | Metabolic Cirrhosis |
Hemolysis | Infection Inflammation Infestation |