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kidney stone
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kidney stone
What causes kidney stones and how to prevent them
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kidney stone
kidney stone Kidney stone.

kidney stone

medical disorder
Also known as: renal calculi, renal calculus
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Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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kidney stone, concretion of minerals and organic matter that forms in the kidneys. Such stones may become so large as to impair normal renal function. Urine contains many salts in solution, and if the concentration of mineral salts becomes excessive, the excess salt precipitates as crystals that may enlarge to become visible, solid particles called stones. Kidney stones are classified as primary if they form without apparent cause, such as an infection or obstruction. They...

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