<unk> , also known as stenosing tenosynovitis, is a disorder characterized by catching or locking of the involved finger in full or near full flexion, typically with force. There may be tenderness in the palm of the hand near the last skin crease (distal palmar crease). The name<unk> " may refer to the motion of "catching" like a<unk>  on a gun. Most commonly the ring finger or thumb is affected. The problem is generally idiopathic (no known cause). There may be an association with diabetes. The pathophysiology is enlargement of the flexor tendon and the A1 pulley of the tendon sheath. While often referred to as a type of stenosing tenosynovitis (which implies inflammation) the pathology is mucoid degeneration. Mucoid degeneration is when fibrous tissue such as tendon has less organized collagen, more abundant extra-cellular matrix, and changes in the cells (fibrocytes) to act and look more like cartilage cells (chondroid metaplasia). Diagnosis is typically based on symptoms and signs after excluding other possible causes.<unk>  digits can resolve without treatment. Treatment options that are disease modifying include steroid injections and surgery. Splinting immobilization of the finger may or may not be disease modifying.
Trigger finger
Pigeon toe
Jammed finger
Hammer toe
Jersey finger
Trench foot
Rocker bottom foot
Mallet finger