J Korean Bone Joint Tumor Soc.  2013 Jun;19(1):37-41. 10.5292/jkbjts.2013.19.1.37.

Solitary Ancient Schwannoma in Upper Arm: A Case Report

• Lee YT
• Kim C
• Park SH
• Kie JH

• KMID: 1431659
• DOI: http://doi.org/10.5292/jkbjts.2013.19.1.37

Abstract

Ancient schwannoma is a variant of schwannoma and is characterized slowly growing tumor with degenerative change. And it is reported that schwannoma is relatively rare in extensor area. As a rare cause of solitary ancient schwannoma in extensor area of upper arm, we report it.

Keyword

ancient schwannoma; upper arm

MeSH Terms

Arm
Neurilemmoma

Figure

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  Figure 1. Plain elbow lateral x-ray shows soft tissue tumor density in extensor area without calcification.

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  Figure 2. These are the magnetic resonance image findings of mass. (A) Axial T1-weighted MR image shows inhomogeneous low signal intensity. (B) Axial T-2 weighted MR image shows heterogenous high signal intensity.

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  Figure 3. The specimen consists of a pinkish encapsulated cystic mass from the right elbow, measuring 2.5×2×1.7 cm.

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  Figure 4. (A) Well encapsulated with diffuse hemorrhage (H&E, ×14). (B) Verocay bodies, which are acellular areas surrounded by nuclear palisades composed of spindle cells (H&E, ×200). (C) Spindle cells show diffuse and strong immunoreactivity for S-100 protein (×200).

Reference

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