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Related Concept Videos

Spinal Nerves: Plexus I01:22

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Related Experiment Video

Updated: Jun 29, 2025

Author Spotlight: Ultrasound-Guided Needle Release Combined with Corticosteroid Injection for the Treatment of Supinator Syndrome
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Neglected posterior interosseous nerve injury.

Dong Yun Lee1, Jung Soo Yoon1, SooA Lim1

  • 1Department of Plastic and Reconstructive Surgery, DongGuk University School of Medicine, Seoul, South Korea.

Trauma Case Reports
|April 4, 2024
PubMed
Summary

A rare posterior interosseous nerve (PIN) injury, caused by a penetrating forearm wound, led to finger extension loss. Delayed nerve repair with a cable graft successfully restored function.

Keywords:
Cable graftPosterior antebrachial cutaneous nervePosterior interosseous nerveUpper extremity

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Last Updated: Jun 29, 2025

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Area of Science:

  • Orthopedic Surgery
  • Neurology
  • Hand Surgery

Background:

  • Posterior interosseous nerve (PIN) injuries are infrequent due to the nerve's deep anatomical position.
  • Penetrating trauma to the forearm presents a diagnostic challenge for PIN injury.

Observation:

  • A 49-year-old male presented with loss of extension in the thumb, index, and small fingers, and thumb abduction weakness after a penetrating forearm injury.
  • Initial emergency surgery for the forearm wound did not identify the extent of the nerve damage.

Findings:

  • Delayed examination revealed significant finger extension deficits (20° thumb/index, 30° small finger) and a neuroma at the proximal PIN stump.
  • A double-strip cable graft was utilized for delayed nerve repair.

Implications:

  • Highlights the importance of thorough preoperative physical examination for neurovascular deficits in forearm penetrating injuries.
  • Emphasizes the necessity of careful surgical exploration and timely repair of posterior interosseous nerve injuries, even in emergency settings.