The Fate of Anterior Interosseous Nerve Syndrome

Yoo,  Myung Jae; Ahn,  Hee Chan; Seo,  Jae Sung; Woo,  Sang Hyun

doi:2017.22.1.49

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Arch Hand Microsurg > Volume 22(1); 2017 > Article

Original Article

Journal of the Korean Society for Surgery of the Hand 2017;22(1):49-56.
Published online March 31, 2017.
DOI: https://doi.org/10.12790/jkssh.2017.22.1.49

The Fate of Anterior Interosseous Nerve Syndrome

Myung Jae Yoo, Hee Chan Ahn, Jae Sung Seo, Sang Hyun Woo

W Institute for Hand and Reconstructive Microsurgery, W Hospital, Daegu, Korea. handwoo@hotmail.com

Received: 11 December 2016 • Revised: 16 January 2017 • Accepted: 16 January 2017

Abstract

Purpose
We report the causes and prognosis of anterior interosseous nerve syndrome (AIN) according to the treatment.

Methods
From March 2009 to December 2015, the 20 patients with the clinical symptom of AIN syndrome were enrolled in the study and electromyography (EMG) of AIN was performed. We retrospectively reviewed hand function test, active range of motion, the disabilities of the arm, shoulder and hand (DASH) score and EMG during the recovery from disease. We further surveyed the time of recovery and residual symptoms.

Results
The patients with unknown cause of the disease (12 cases), heavy work or trauma (6 cases) and infection (2 cases) were investigated in the study. Thirteen out of 15 cases with conservative treatment and 2 out of 5 cases with a surgical treatment at an average of 8 months from disease were recovered. In addition, 8 cases with fine motor disturbance and 3 cases with tingling residual symptom were observed.

Conclusion
Due to the low possibility of entrapment neuropathy, conservative treatment for 7 months is the first choice rather than surgical treatment. If there is no improvement from the conservative treatment, surgical exploration of AIN is the indication of treatment. After recovery, patients may have the symptoms of fine motor disturbance and tingling.

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