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Nephrolithiasis is a common urinary disorder. It mostly affects people between 30 and 50 years old. It consists in the formation of deposits in the urinary system made of chemical substances that are usually found in the urine when their concentration exceeds the so-called solubility threshold. Depending on the chemical composition of the resulting deposits, specialists talk about oxalate, phosphate, urate or cystine stones. Stones are most often found in the kidneys themselves, but can travel to the ureters or bladder.