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[Urinary lithiasis: epidemiology and physiopathology]
S Ekane1, T Wildschutz, J Simon
1Service d'Urologie, Université Libre de Bruxelles, Hôpital Erasme.
Acta Urologica Belgica
|February 21, 1998
Summary
Urinary stone disease (urolithiasis) affects 12% of men and 5% of women, influenced by various epidemiological and genetic factors. Understanding lithogenesis mechanisms is key to managing diverse stone types like calcium and uric acid stones.
Area of Science:
- Nephrology
- Urology
- Biochemistry
Background:
- Urolithiasis affects a significant portion of the population, with higher incidence in men (12%) compared to women (5%) before age 70.
- Predisposition to urinary stone disease involves a complex interplay of epidemiological factors including age, sex, race, environment, lifestyle, and genetics.
- Lithogenesis, the process of stone formation, is governed by physicochemical mechanisms such as urine saturation, nucleation, crystallization, and crystal growth, often occurring when natural inhibition processes fail.
Purpose of the Study:
- To provide a comprehensive overview of urolithiasis, encompassing its incidence, epidemiological risk factors, and the underlying physicochemical mechanisms of stone formation.
- To categorize the common types of urinary stones based on their aetiology and associated pathophysiological pathways.
Main Methods:
- Review of epidemiological data on urolithiasis incidence and risk factors.
- Analysis of physicochemical principles governing urine saturation, nucleation, crystallization, and crystal growth.
- Classification of urinary stones based on chemical composition and underlying disease mechanisms.
Main Results:
- Identified key epidemiological factors contributing to urolithiasis, including demographic, environmental, and genetic elements.
- Described the physicochemical cascade from supersaturation to crystal growth in lithogenesis.
- Categorized urinary stones into major types: calcium, uric acid, cystine, and magnesium ammonium phosphate, highlighting diverse pathophysiological origins.
Conclusions:
- Urolithiasis is a multifactorial disease influenced by a wide range of epidemiological and genetic factors.
- Understanding the physicochemical processes of lithogenesis is crucial for comprehending the development of different urinary stone types.
- The diverse aetiologies of urinary stones necessitate tailored approaches for prevention and management, considering their specific composition and formation mechanisms.