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Trauma Mon. 2019;24(3): e85461.
doi: 10.5812/traumamon.85461

Scopus id: 85067262515
  Abstract View: 88
  PDF Download: 69

Case Report

Progressive Radial Nerve Entrapment Resulted in Finger Drop: A Case Report

Mohammadreza Emamhadi 1, Roxana Emamhadi 2, Sasan Andalib 3,4,5,6,7 *

1 Brachial Plexus and Peripheral Nerve Injury Center, Guilan University of Medical Sciences, Rasht, Iran
2 Department of Biotechnology, School of Basic Sciences, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran
3 Neuroscience Research Center, Poursina Hospital, Guilan University of Medical Sciences, Rasht, Iran
4 Department of Neurosurgery, Poursina Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
5 Road Trauma Research Center, Poursina Hospital, Guilan University of Medical Sciences, Rasht, Iran
6 Department of Nuclear Medicine, Odense University Hospital, Odense, Denmark
7 Department of Clinical Research, Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark
* Corresponding author: Neuroscience Research Center, Department of Neurosurgery, Poursina Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran. Tel/Fax: +98-1333322444, Email: Email: andalib@gums.ac.ir

Abstract

Introduction: Posterior interosseous nerve (PIN) palsy gives rise to various symptoms. The PIN due to lipoma is rare. Here, we report a case of progressive loss of finger extension due to a giant painless parosteal lipoma.

Case Presentation: A 52-year-old patient with progressive weakness of finger extension with diagnosis of posterior interosseous nerve (PIN) palsy was referred to our clinic. Electrophysiological studies showed a right PIN neuropathy at the level of the forearm. The patient had no history of trauma of the hand. The patient underwent surgery for tumor removal and nerve decompression. The loss of finger extension due to PIN palsy gradually recovered after tumor removal and the nerve recovered from the motor deficits. The patient showed no recurrence of motor deficit after the surgery in the follow-up.

Conclusions: Since PIN palsy may arise from lipoma early surgical exploration and the excision of deep-seated lipoma in the proximal forearm is recommended in order to avoid permanent damage to PIN or other branches of the radial nerve.

Keywords: Parosteal Lipoma, Finger Drop, Posterior Interosseous Nerve, Palsy

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Submitted: 17 Oct 2018
Revised: 19 Mar 2019
Accepted: 12 Apr 2019
First published online: 07 May 2019
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