J Korean Soc Radiol.  2018 Aug;79(2):63-67. 10.3348/jksr.2018.79.2.63.

MRI Findings of Intercostal Schwannoma: A Case Report

• Sim HY
• Yang I
• Hong HS
• Woo JY
• Hwang JY
• Moon JH
• Kim HM
• Kim HJ
• Hwang SM
• Shin MK
• Kim HY

• KMID: 2416390
• DOI: http://doi.org/10.3348/jksr.2018.79.2.63

Abstract

Intercostal schwannomas are uncommon, encapsulated neoplasms that originate in nerve sheaths of intercostal nerves. They account for less than 10% of primary neural tumors of the chest wall. Herein, we report a pathologically confirmed case of intercostal schwannoma with typical magnetic resonance imaging findings.

MeSH Terms

Intercostal Nerves
Magnetic Resonance Imaging*
Neurilemmoma*
Thoracic Wall

Figure

• 

  Fig. 1 A 61-year-old woman with intercostal schwannoma involving the right 5th intercostal nerve. A. Chest radiography shows a nodular lesion abutting on right upper chest wall, just inferior to 5th rib (arrows). B. Pre-enhanced CT demonstrates a 1.5 cm nodule showing heterogeneous attenuation in the chest wall, just inferior to the 5th rib. After CE, the mass shows thin peripheral enhancement. C. The mass reveals low signal intensity on T1WI, intermediate signal intensity with internal high signal intensity focus (arrowhead) on T2WI. On gadolinium-enhanced fat-suppressed T1WI, it shows bright enhancement, with tiny non-enhancing area (arrowhead) corresponding to the high signal intensity focus on T2WI. D. Intraoperative thoracoscopic image demonstrates a well circumscribed mass abutting on inferior margin of the right 5th rib showing mass effect on the chest wall. CE = contrast enhancement, CT = computed tomography, T1WI = T1-weighted image, T2WI = T2-weighted image E. Photomicrograph shows an Antoni A zone of compact cellular architecture with nuclear palisading (Verocay bodies) and Antoni B zone of spindle or rounded cells within loose myxoid stroma (hematoxylin and eosin stain, × 100). F. Photomicrograph shows diffuse strong positive finding in S100 immunohistochemical stain (× 100).

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