Tuberculosis of the entheses.

PURPOSE: Tuberculosis of the osteoarticular system usually manifests as joint arthritis. There is no available English literature on the tubercular involvement of the enthesis (tendon-bone junction).

METHODS

We performed a retrospective analysis on 14 patients with tuberculosis of the tendon-bone junction. Patients presenting with a sinus with or without presence of radiological evidence of bone destruction around the enthesis, and pain unresponsive to a trial of analgesics and physical therapy, were evaluated by closed or open biopsy for tuberculosis. A staging system is proposed for biopsy-proven tuberculosis of the enthesis.

RESULTS

Between 2006 and 2010, we treated 14 patients with tuberculosis of the tendon-bone junction. Biopsy-proven cases of tuberculosis of the enthesis were administered anti-tubercular drugs for a period of one year. Sequestrectomy was performed in advanced lesions. The tendon-bone junction was rested until the features of its healing were clinically evident. The patients aged between 18 and 52 years were followed up for an average of 1.7 years after cessation of anti-tubercular drug therapy. They responded favourably, and none had recurrence of the disease.

CONCLUSIONS

This study describes the tubercular involvement of the entheses, which heretofore has not been described in the literature. The rarity of its occurrence and lack of suspicion of an infectious aetiology in these locations frequently results in late diagnosis and incorrect initial treatment. This study also supports the "microtrauma theory" in the genesis of osteoarticular tuberculosis.