ULTRA-MICROCRYSTALS IN PYROPHOSPHATE ARTHROPATHY - CRYSTAL IDENTIFICATION AND CASE-REPORT

  • 1 January 1980
    • journal article
    • research article
    • Vol. 207  (1) , 89-92
Abstract
A patient with pyrophosphate arthropathy is reported who had no calcifications on joint radiographs, and no crystals were found in polarized light microscopy of the synovial fluid. Using techniques for identification of crystals at the ultrastructural level, abundant small (.ltoreq. 1 .mu.) pyrophosphate crystals were recognized and identified. The possibility of ultramicrocrystal depositions, including pyrophosphate arthropathy, is important to consider in acute arthritides since small crystals might cause more intense inflammation and be the cause of arthritides, hitherto not possible to classify.

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