Selective Fascicular Involvement of the Median Nerve Trunk Causing Pseudo-Anterior Interosseous Nerve Syndrome: Ultrasound and MR Imaging Features
10.3349/ymj.2020.61.6.547
- Author:
Yoon Young JUNG
1
;
Yun Sun CHOI
;
Chang-Hun LEE
;
Ohyun KWON
;
Minchul KIM
Author Information
1. rtments of Radiology, Nowon Eulji Medical Center, Eulji University, Seoul, Korea
- Publication Type:Case Report
- From:Yonsei Medical Journal
2020;61(6):547-552
- CountryRepublic of Korea
-
Abstract:
Fascicular involvement of the median nerve trunk in the upper arm is uncommon in cases of peripheral neuropathy, and its symptoms are consistent with those of anterior interosseous nerve (AIN) syndrome. We report three cases of focal anterior interosseous fascicular involvement in the median nerve trunk presenting as AIN palsy. Our report emphasizes the unique ultrasonographic and magnetic resonance imaging (MRI) features of swelling, hourglass-like constriction and torsion, and entwinement of the nerve fascicle of the dorsal region of the median nerve, which were confirmed surgically. On MRI, all patients showed denervation changes in the AIN territory, as well as in the median nerve territory, without compressing structures.
