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Letter
Conspicuous synovial lymphatic capillaries in juvenile idiopathic arthritis synovitis with rice bodies
  1. E Rovenska1,
  2. S Stvrtina1,2,
  3. O Greguska1,
  4. L Pravda1,
  5. J Rovensky1
  1. 1National Institute of Rheumatic Diseases, Piestany, Slovakia
  2. 2Faculty of Medicine, Comenius University, Bratislava, Slovakia
  1. Correspondence to:
    Dr E Rovenska
    National Institute of Rheumatic Diseases Nabr I Krasku 4 Piestany, Slovakia 921 12; rovenskavurch.sk

https://doi.org/10.1136/ard.2003.019984

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    The paper of Mohr discussing the development of rice bodies with apatite crystals in fibrinous debris synovitis in rheumatoid arthritis1 prompted us to describe our recent morphological findings.

    During synovectomy in a 33 year old woman with a longlasting systemic form of juvenile idiopathic arthritis (JIA) a large number of rice bodies and numerous synovial villi connected to the synovial membrane (SM) by very thin stalks were visible in the joint space (JS). Light microscopy of paraffin sections showed that the villi contained fibrin and had degenerated. In the SM, mononuclear infiltration, neoangiogenesis, intimal layer hyperplasia, and fibrin at the synovial surface were found. Light microscopy of serial semi-thin resin sections enabled a distinction to be made between lymphatic capillaries (LC). Prominent LC were …

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