Cite this page: Urates / uric acid. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/stainsurates.html. Accessed December 2nd, 2016.
Definition / General
- Uric acid crystals seen in acid urine
- Urates present in tissue as sodium urate, but soluble in aqueous solutions and slightly soluble in weak alcoholic solutions, so tissue must be fixed in 95%/100% alcohol to prevent leaching of urates
- Urates are stained black by GMS
- Sodium urate crystals are birefringent on polarization