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Composition of bladder stones in Rwanda
British Journal of Urology
|October 1, 1976
Summary
Endemic bladder stones in Rwanda are primarily calcium oxalate monohydrate. Researchers found high levels of rubidium, suggesting it may be a key factor in this unique condition.
Area of Science:
- Urology
- Trace Element Analysis
- Geochemistry
Background:
- Endemic bladder stone formation is rare in Central Africa.
- A specific region in Rwanda exhibits a notable prevalence of bladder stones.
Purpose of the Study:
- To investigate the elemental composition of bladder stones from an endemic area in Rwanda.
- To explore potential etiological factors contributing to bladder stone formation in this region.
Main Methods:
- X-ray diffraction was used to determine the mineral composition of 13 bladder stones.
- X-ray fluorescence and atomic absorption spectrometry were employed to quantify elemental concentrations, focusing on rubidium and zinc.
Main Results:
- Bladder stones were predominantly composed of calcium oxalate monohydrate.
- Significant concentrations of rubidium were detected, approximately 2-5 times higher than zinc.
- Rubidium levels were notably elevated compared to typical concentrations.
Conclusions:
- The findings suggest rubidium may play a crucial role as a lithogenic element in the formation of these endemic bladder stones.
- This elevated rubidium concentration could explain the unusual prevalence of bladder stones in this Central African region.