Crystals in urine

Explanation

Urine crystals are tiny solid particles that can form from substances dissolved in urine. A laboratory can look for them under a microscope and describe their type and amount. This may be part of urinalysis, a set of tests on a urine sample.

Does this mean there is a kidney stone?

Not necessarily. Some crystals can be found without disease. A urine crystal finding does not establish that a stone has formed, and it is different from testing the composition of a stone that has been passed or removed.

Why does the type of crystal matter?

Different crystals have different meanings. How concentrated or acidic the urine is, and some medicines, can affect which crystals appear. A clinician considers the type and amount together with symptoms and other urine findings.

A report that only says crystals gives less information than one that identifies the type. The finding alone cannot show whether treatment is needed.

Report excerptExplanation

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