Clinical Presentation along with Imaging Features of Superficial Peroneal Nerve Shwannoma: A Rare Case Report

Article Information

Aritcle Type: Case Report

Citation: Cellina M, Orsi M, Fetoni V, Oliva G (2015) Clinical Presentation along with Imaging Features of Superficial Peroneal Nerve Shwannoma: A Rare Case Report. J Neurol Neurobiol 1(3): doi http://dx.doi. org/10.16966/2379-7150.111

Copyright: © 2015 Cellina M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Publication history:

 Received date: 24 June 2015

 Accepted date: 24 July 2015

 Published date: 29 July 2015

Authors :

Michaela Cellina^1*   Marcello Orsi¹   Vincenza Fetoni²   Giancarlo Oliva<sup>1

1</sup>Radiological Department, Azienda Ospedaliera Fatebenefratelli e Oftalmico, Corso di Porta Nuova 23, 20121, Milan, Italy
²Neurological Department, Azienda Ospedaliera Fatebenefratelli e Oftalmico, Corso di Porta Nuova 23, 20121, Milan, Italy

*Corresponding author: Michaela Cellina, Radiological Department, Azienda Ospedaliera Fatebenefratelli e Oftalmico, Corso di Porta Nuova 23, 20121, Milan, Italy, Tel: 0039- 0263632424; E-mail: michaela.cellina@fbf.milano.it

Abstract
Schwannomas are encapsulated, benign, slowly growing tumors arising from Schwann cells of peripheral nerve sheath. Although they represent the commonest benign peripheral nerve sheath tumors, the occurrence on the lower limbs and especially from the superficial peroneal nerve is exceptionally rare. We present the clinical manifestations and imaging findings of a superficial nerve Schwannoma presenting as a painful mass in the external compartment of the calf, which was confirmed histologically and we correlate our experience with previously reported cases.

Figure 1: Ultrasonography scan of the external compartment of the left leg Presence of a well-defined, ovoid-shaped, homogeneously hypoechoic, lesion in the peroneus longus muscle.

Figure 2: Contrast-enhanced MRI of the left leg Axial images: T2 weighted image with fat suppression (A) and T1 weighted image after contrast medium injection (B). Coronal images: STIR (C), T1 weighted image before (D) and after (E) contrast medium injection. Ovoid lesion with well-defined smooth margins in the peroneus longus muscle, hyperintense in basal acquisitions, especially in STIR and T2 weighted images, with a marked, homogeneous enhancement after contrast injection. After contrast medium injection (E) the continuity with superficial peroneal nerve, known as “tail sign”, is well visible.


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