Explanation • Trigger finger is caused by stenosing tenosyno | NEET PG/NEXT (MCQs)

Explanation

• Trigger finger is caused by stenosing tenosynovitis of the flexor sheath. There is nodular or fusiform swelling on the flexor tendon.
• When the finger is flexed or extended, the nodular swelling passes through the A1 pulley with a snap, leading to triggering effect.
• The nodule can be trapped behind the A1 pulley leading to locking of the finger in flexion.
• Surgical treatment involves the release of A1 pulley, which is thickened and fibrosed.