There is marked synovial thickening around the flexor tendons and fluid in the tendon sheath which is clearly seen on MRI. Post-contrast study is useful in distinguishing the thick tenosynovium from the surrounding structures and fluid in the tendon sheath. The well-enhanced tenosynovium can also be seen in the carpal tunnel. On the basis of these findings, we could easily distinguish tenosynovitis from other soft-tissue-mass lesions, such as tumors or infected ganglia. Tuberculous tenosynovitis is often not diagnosed early, and its differentiation from soft tissue tumors may be clinically difficult. MRI, particularly post-contrast study, is useful for early diagnosis of, and planning treatment for, tuberculous tenosynovitis.

There is thickening of the tenosynovium along the flexor tendons of the wrist.

Visualized bones are normal.

Imaging features are suggestive of TB tenosynovitis of the left wrist.