Kidney stones
Conditions
Nephrology
What exactly are kidney stones, and how big are they?
Kidney stones are solid masses, or, in other words, hard stone-like lumps, that form in the kidney or ureter (the tube that connects the kidneys to the bladder) as a result of substances in the urine. The size of a kidney stone can vary, but most typically they are as small as a grain of sand or as big as a pearl.
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