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Anterior interosseous nerve syndrome: a case report
1Orthopedic Surgery Department, University of Oklahoma Health Sciences Center, USA.
The Journal of the Oklahoma State Medical Association
|April 18, 2002
Summary
Anterior interosseous nerve syndrome resistant to nonoperative care resolved with surgical decompression. A rare fibrous band and venous ring compressing the nerve were identified and released, restoring muscle function.
Area of Science:
- Orthopedic Surgery
- Neuroanatomy
- Vascular Anatomy
Background:
- Anterior interosseous nerve (AIN) syndrome, a condition affecting forearm muscles, often presents with motor deficits.
- Nonoperative management is typically the initial approach for AIN syndrome.
- Persistent symptoms despite conservative treatment warrant surgical investigation.
Observation:
- A patient with refractory AIN syndrome underwent surgical exploration.
- Intraoperative findings revealed anomalous anatomical structures causing nerve compression.
- These included a fibrous band from the flexor digitorum superficialis to the brachialis muscle fascia and a venous ring around the nerve.
Findings:
- The anomalous fibrous band was distinct from the normal arcade over the median nerve.
- The venous ring encircled the AIN at the level of the anomalous arcade.
- Surgical decompression involved releasing these aberrant structures.
Implications:
- This case highlights rare anatomical variations causing AIN syndrome.
- Surgical intervention can be effective for refractory cases.
- Understanding anomalous neurovascular relationships is crucial for successful surgical outcomes.