2014
DOI: 10.1136/annrheumdis-2014-eular.3127
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AB0842 A Simple Method for the Microscopic Identification of Calcium Pyrophosphate Dihydrate and Hydroxyapatite Deposits in Metabolic and Crystal Induced Diseases

Abstract: Background Arthropathy induced by calcium pyrophosphate dihydrate [Ca2P2O7.2H2O] (CPPD) crystals (chondrocalcinosis, pseudogout, pyrophosphate arthropathy) and arthropathy induced by hydroxyapatite [Ca5(PO4)3(OH)] (HA) crystals (apatite rheumatism) are separate entities. CPPD and HA crystals may exist together in association with more or less abundant amorphous calcium phosphate, or carbonate deposits. CPPD has a rhomboid shape, they range in size is from submicroscopic to 40μm. HA crystals are small, 50-500 n… Show more

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Cited by 3 publications
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“… 1. Tissue blocks of surgically removed specimens are fixed in 8% neutral buffered formalin (at pH 7.6 for >24 h at 20°C room temperature) [ 1 , 12 – 16 ]. 2.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“… 1. Tissue blocks of surgically removed specimens are fixed in 8% neutral buffered formalin (at pH 7.6 for >24 h at 20°C room temperature) [ 1 , 12 – 16 ]. 2.…”
Section: Resultsmentioning
confidence: 99%
“…Some authors believe that HA crystals are identical with the amorphous mineral deposits stained with Alizarin red S [6-10], although Alizarin red S staining is not specific for HA crystals [11]. Moreover, calcium and phosphorus in crystalline structure do not stain with Alizarin red S or with the von Kossa reaction [12][13][14][15][16].…”
Section: Introduction Serendipity-the Unexpected and Incidental Disco...mentioning
confidence: 99%
“…In sections stained with H-E: MSU crystals were present in 24 and hydroxyapatite arthritis (in case of standard stains and reaction in comparison with Bély and Apáthy's "non-staining" technique) is summarized in Table 3.…”
Section: Prevalence Of Msu Cppd Ha and Cholesterol Crystals Or Crysmentioning
confidence: 99%
“…In case of suspected metabolic or crystal induced disorders, we suggest analyzing the tissue samples with unstained tissue sections as well, supplemented with traditional stainings and reactions. Crystals remain detectable in unstained sections viewed under polarized light in the great majority of cases which appear negative with H-E staining [22][23][24][32][33][34].…”
Section: Disclosure Statementmentioning
confidence: 99%
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