Rheumatology 2000; 39: 1290-1292
© 2000 British Society for Rheumatology
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Aseptic psoas pyomyositis and erosive discitis in a case of calcium pyrophosphate crystal deposition disease
Service de Rhumatologie, Médecine Physique et Réhabilitation, Centre Hospitalier Universitaire Vaudois, CHUV 1011 Lausanne, Switzerland
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SIR, Iliopsoas abscess and pyomyositis are rare clinical entities. Except for a few cases of carcinoma or focal myositis mimicking abscesses [1, 2], they are infectious. The concurrence of spondylodiscitis and bilateral psoas abscesses is virtually pathognomonic of an infectious process, Staphylococcus, Brucella and Mycobacterium tuberculosis being the most likely organisms. We report a case of calcium pyrophosphate crystal deposition (CPPD) disease presenting with erosive spondylodiscitis associated with an aseptic inflammatory reaction of both psoas muscles which mimicked such an infectious process.
A 76-yr-old woman was admitted for exacerbation of chronic low back pain with leg weakness and repetitive falls. There was a history of diabetes with discrete polyneuropathy, chronic venous insufficiency, hypertension and mild chronic renal insufficiency. She had CPPD disease with radiological chondrocalcinosis at the wrists, knees
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