WOTD: Tenosynovitis

A 3-year-old child with congenital stenosis tenosynovitis thumb. Thumb can't be straightened.
Photograph: Shizhao 于2006年

"Tenosynovitis" - Inflammation of the lining of the sheath that surrounds a tendon. The usual cause is excessive friction caused by repetitive movements; bacterial infection is a rare cause. The hands and wrists are most often affected. Symptoms include pain, tenderness, and swelling over the tendon. Treatment is with nonsteroidal anti-inflammatory drugs (NSAIDs) or a local injection of a corticosteroid drug. However, if infection is the cause antibiotic drugs are prescribed. A splint to immobilise the joint or surgery may also be needed.

"tenosynovitis". British Medical Association (2007). Illustrated Medical Dictionary. 2nd ed. London: Dorling Kindersley (DK). p542.