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Posterior Interosseous Nerve Palsy Caused by a Ganglion of the Arcade of Frohse
Clinics in Shoulder and Elbow 2018;21:252-255
Published online December 1, 2018
© 2018 Korean Shoulder and Elbow Society.

Seung Jin Lee, Yoon Suk Hyun, Seung Ha Baek, Ji Hyun Seo, Hyun Ho Kim

Department of Orthopedic Surgery, Kangdong Sacred Heart Hospital, Hallym University Medical Center, Seoul, Korea
Correspondence to: Yoon Suk Hyun
Department of Orthopedic Surgery, Kangdong Sacred Heart Hospital, Hallym University Medical Center, 150 Seongan-ro, Gangdong-gu, Seoul 05355, Korea
Tel: +82-2-2224-2230, Fax: +82-2-489-4391, E-mail: yshyun72@gmail.com, ORCID: https://orcid.org/0000-0003-3826-2527
IRB approval: Kangdong Sacred Heart Hospital (No. KANGDONG 2017-10-009).
Received September 10, 2018; Revised October 14, 2018; Accepted October 22, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
A 51-year-old male who is right-handed visited the outpatient for right fingers-drop. The patient셲 fingers, including thumb, were not extended on metacarpophalangeal joint. The active motion of the right wrist was available. The electromyography and nerve conduction velocity study were consistent with the posterior interosseous neuropathy. Further evaluation was done with the magnetic resonance imaging for finding the space-occupying lesion or any possible soft tissue lesion around the radial nerve pathway. On magnetic resonance imaging, the ganglion cyst, which was about 1.8 cm in diameter, was observed on the proximal part of the superficial layer of the supinator muscle (Arcade of Frohse). The surgical excision was done on the base of ganglion cyst at the base of stalk of cyst which looked to be connected with proximal radioulnar joint capsule. The palsy had completely resolved when the patient was observed on the outpatient department a month after the operation.
Keywords : Posterior interosseous nerve palsy; Ganglions; Arcade of Frohse