Mycobacterium kansasii causing chronic monoarticular synovitis in a patient with HIV/AIDS

Leo Menashe, Leslie Dubin Kerr, George Hermann

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2 Scopus citations


Mycobacterium kansasii is a nontuberculous mycobacterium that primarily causes pulmonary disease in AIDS patients, however it has also been known, rarely, to result in skeletal infection. When skeletal infection occurs, the time from onset of symptoms to diagnosis is up to 5 years in previously reported cases. We describe a 48-year-old woman with HIV/AIDS who presented with chronic, isolated left knee pain and swelling of over two decades which had recently worsened. Radiographs and magnetic resonance imaging demonstrated marked subarticular erosions, synovial thickening, and bone marrow edema, which had progressed compared with prior imaging done seven years earlier. Synovial biopsy grew Mycobacterium kansasii. Following the presentation of our case, clinical and imaging findings, including the differential diagnosis, of monoarticular arthritis caused by Mycobacterium kansasii are reviewed and discussed.

Original languageEnglish
Pages (from-to)26-35
Number of pages10
JournalJournal of Radiology Case Reports
Issue number9
StatePublished - Sep 2015


  • AIDS
  • Atypical mycobacterial synovitis and osteomyelitis
  • Atypical mycobacterium
  • HIV
  • Knee
  • MRI
  • Mycobacterium kansasii
  • Mycobacterium kansasii septic arthritis and osteomyelitis
  • Osteomyelitis
  • Radiograph
  • Septic arthritis
  • Synovitis


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