title: Analysis of urinary calculi in adults. Attempt of correlations between morphology and composition.
abstract: The analysis of 322 urinary calculi in adults by microdissection, infrared spectromorphometry and microchemistry has shown that stones could be classified in several groups according to their morphology and composition: 8 morphological types have been defined (2 for the oxalic, 2 for the uric, 2 for the phosphatic and 2 for the cystinic stones). Correlations between morphology and composition have been established dividing the calculi into 10 categories, 4 for the pure forms and 6 for the mixed forms; the total includes approximately 94% of the calculi analyzed. An 11th category gathering various lithiases (rare or with multiple components) represents 6% of the cases. Moreover, the study of the localization of the component in stones emphasizes the high frequency of Ca phosphates in the nucleus of oxalic lithiases: 80% in mixed forms, in which the oxalate is the main constituent.
mesh_terms: D000328:Adult; D001031:Apatites / Q000032:analysis; D002129:Calcium Oxalate / Q000032:analysis; D003553:Cystine / Q000032:analysis; D006801:Humans; D013055:Spectrophotometry, Infrared; D014527:Uric Acid / Q000032:analysis; D014545:Urinary Calculi / Q000145:classification* / Q000473:pathology
chemical_list: D001031:Apatites; D002129:Calcium Oxalate; D014527:Uric Acid; D003553:Cystine