Poncet's disease (tuberculous rheumatism): two case reports and review of the literature.

We report two human leukocyte antigen (HLA) B27-positive cases of urogenital tuberculosis (TB) with asymmetric polyarthritis. Stained smears with Ehrlich Ziehl-Neelsen and polymerase chain reaction (PCR) tests for Mycobacterium tuberculosis complex (MTC) of the ejaculate were positive in both cases, despite negative cultures. Stained smear, culture and PCR results of the synovial fluid for mycobacteria were negative. The patients were diagnosed with Poncet's disease. Polyarthritis was resolved rapidly with anti-tuberculosis treatment. We suggest that in cases with unexplained arthritis and non-articular TB, Poncet's disease should be considered. PCR can be used in the routine diagnostic algorithm when conventional methods fail to identify MTC.