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Calcium carbonate in cholesterol gallstones
A Ruiz de Aguiar1, J A Medina Núñez, M I Lopez Domingo
1Department of Medicine, San Carlos Hospital, Complutense University, Madrid, Spain.
Journal of Hepatology
|February 1, 1988
Summary
Calcium carbonate (CaCO3) polymorphs were identified in cholesterol-rich gallstones. CaCO3 presence may influence gallstone resistance to medical treatments.
Area of Science:
- Mineralogy
- Gastroenterology
- Biomineralization
Background:
- Gallstones are common, with cholesterol stones being prevalent.
- The composition of gallstones can influence their physical properties and treatment response.
- Calcium carbonate (CaCO3) is a mineral that can be found in various biological structures.
Purpose of the Study:
- To characterize the polymorphs of CaCO3 present in cholesterol-predominant gallstones.
- To investigate the localization and association of CaCO3 within gallstone structures.
- To discuss the implications of CaCO3 precipitation in gallstone formation and treatment resistance.
Main Methods:
- X-ray diffraction for mineral phase identification.
- Polarised light microscopy for crystallographic analysis.
- Scanning electron microscopy for morphological characterization.
Main Results:
- Identified calcite and vaterite polymorphs of CaCO3.
- Observed rhombohedral, aggregate, and tabular crystal forms.
- Found CaCO3 predominantly in the periphery, associated with calcium bilirubinate.
Conclusions:
- Cholesterol gallstones can contain diverse CaCO3 polymorphs.
- CaCO3 deposition, particularly with calcium bilirubinate, may occur at the gallstone periphery.
- The presence of CaCO3 could contribute to the resistance of gallstones to pharmacologic therapies.