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Normally, during finger flexion, the flexor tendon glides smoothly under its anchoring pulleys [Figure 1]. In trigger finger, however, pathological metaplasia and thickening of the pulley structures[1] cause friction and… Click to show full abstract
Normally, during finger flexion, the flexor tendon glides smoothly under its anchoring pulleys [Figure 1]. In trigger finger, however, pathological metaplasia and thickening of the pulley structures[1] cause friction and entrapment of the underlying flexor tendon during finger manoeuvres. This impingement corresponds to the classical symptom of painful ‘catching’ of the finger experienced by the patient. Typically, the first annular pulley (A1) located over the metacarpophalangeal joint is most frequently affected. The dominant hand is also observed to be the more susceptible side, with the thumb, middle and ring fingers being the most affected digits.[2,3]
Journal Title: Singapore Medical Journal
Year Published: 2023
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