Az urátkristályok kimutatásának egyszerû módszere formalinfixált szóvetmintákon

Translated title of the contribution: A simple method to demonstrate urate crystals in formahn lixed tissue

Bély Miklós, Krutsay Miklós

Research output: Contribution to journalArticle

1 Citation (Scopus)


In our previous study we refuted the thesis that sodium urate crystals are not, or only rarely detectable in formalin-fixed histological samples because they dissolve in the aqueous formalin solution. Our observations indicate that dissolution of urate crystals is primarily caused by haematoxylineosin staining. Undeniably, however, urate crystals are partially dissolved in the aqueous solution of formaldehyde, and thus a small amount of urate deposits may totally dissolve from tissue samples. The aim of the present study was to identify those steps of the staining procedure that are responsible for the dissolution of urate crystals. We found that the dissolution of urate crystals during the course of staining was caused by the combined effects of haematoxylin staining, treatment with 1% aqueous lithium carbonate solution and dehydration with acetone. As the simplest histological method for the detection of urate crystals, we recommend examining unstained sections (mounted with Canada balsam) of formalin-fixed, paraffin-embedded tissue samples in polarised light. According to our previous study, about two thirds of urate crystals remain detectable on unstaied sections, whereas haematoxylin-eosin stained sections of the same tissue samples (derived from patients with gout) did not contain urate crystals. In the samples where urate crystals could be detected in haematoxylineosin stained sections using polarised light, the unstained sections contained much more crystals, which shows that dissolution is greatly decreased on unstained sections.

Translated title of the contributionA simple method to demonstrate urate crystals in formahn lixed tissue
Original languageHungarian
Pages (from-to)271-275
Number of pages5
JournalLege Artis Medicinae
Issue number5-6
Publication statusPublished - Jul 24 2013

ASJC Scopus subject areas

  • Medicine(all)

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