1. What is the etiology of trigger finger?
*2. What is the etiology of mallet finger?
3. What is the treatment of mallet finger?
Answers:
1. Trauma to the flexor tendon, resulting in thickening and a nodule. Clicking or locking is felt when the nodule passes through the tendon sheath.
2. Rupture of the extensor tendon in the distal phalanx secondary to forceful flexion, resulting flexed DIP.
3. Splint to immobilize distal phalanx in hyperextension 6-12 wks. Surgical treatment for poor healing, volar subluxation, or avulsion > 1/3 of the bone.
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