Abstract
Synovitis of the ulnar bursa is associated with tenosynovitis of the flexor tendons. Reported causes include suppurative or tuberculous infection, rheumatoid arthritis, and pigmented villonodular synovitis. Open synovectomy requires extensive soft-tissue dissection and may result in extensive scarring. The purpose of this Technical Note is to describe the technical details of endoscopic synovectomy of the ulnar bursa of the palm of the hand. This minimally invasive approach with small incisions allows aggressive postoperative hand therapy and avoids the complications of tendon adhesions, joint contractures, and hand stiffness.