Tuberculous arthritis
accounts for approximately 1% of all cases of tuberculosis and 10% of
extrapulmonary cases.
Clinical presentation of tuberculous arthritis
Clinical presentation of tuberculous arthritis
- The most common clinical presentation is chronic granulomatous monarthritis.
- An unusual syndrome, Poncet’s disease, is a reactive symmetric form of polyarthritis that can affects persons with visceral or disseminated tuberculosis. No mycobacteria are identified in the joints, and symptoms resolve with antituberculous treatment.Unlike the tuberculous osteomyelitis which typically affect the thoracic and lumbar spine in about 50% of cases, tuberculous arthritis primarily involves the large weight-bearing joints, especially the hips, knees, and ankles, and only occasionally involves smaller non-weight-bearing joints. Progressive monarticular swelling and pain may develop over months or years, and systemic symptoms are seen in only half of all cases.
Aspiration of the involved joint yields synovial fluid
with the following findings
- An average cell count of 20,000/μL, with approximately 50% neutrophils.
- Acid-fast staining of the fluid yields positive results in fewer than one-third of cases,
- Cultures are positive in 80%.
- Culture of synovial tissue taken at biopsy is positive in ~90% of cases and shows granulomatous inflammation
- NAA methods can shorten the time to diagnosis to 1 or 2 days.
- Peripheral erosions at points of synovial attachment
- Periarticular osteopenia,
- Eventually jointspace narrowing
This is the same as
that for tuberculous pulmonary disease, administration of multiple agents for
6–9 months. Therapy is more prolonged in immunosuppressed individuals such as
those infected with HIV.