Ann Dermatol.  2020 Feb;32(1):64-68. 10.5021/ad.2020.32.1.64.

Schwannoma Presenting as a Scalp Mass: A Case Report with Magnetic Resonance Imaging Findings

Affiliations
  • 1Department of Dermatology, Seoul National University College of Medicine, Seoul, Korea. jehomun@gmail.com
  • 2Institute of Human-Environment Interface Biology, Seoul National University, Seoul, Korea.

Abstract

A schwannoma can develop anywhere along the course of nerves. However, a schwannoma presenting as a scalp nodule is rare. Here, we present a rare case of schwannoma on the scalp with a review of magnetic resonance imaging (MRI) findings, which was initially misdiagnosed as an epidermal cyst or vascular malformation despite various radiologic examinations. Recognition of characteristic MRI features of schwannomas, such as low signal margin, target, entering-and-exiting-nerve, and fascicular signs, may result in an accurate diagnosis and proper management of tumors. In this report, we summarized differential characteristics of a schwannoma with an epidermal cyst and a lipoma.

Keyword

Magnetic resonance imaging; Nerve sheath neoplasms; Neurilemmoma; Scalp; Skin neoplasm

MeSH Terms

Diagnosis
Epidermal Cyst
Lipoma
Magnetic Resonance Imaging*
Nerve Sheath Neoplasms
Neurilemmoma*
Scalp*
Skin Neoplasms
Vascular Malformations
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