Journal of the Korean Society of Magnetic Resonance in Medicine  2011;15(2):170-175

doi:10.13104/jksmrm.2011.15.2.170

Ancient Schwannoma of the Thigh mimicking a Plexiform Malignant Peripheral Nerve Sheath Tumor: A Case Report.

Yeon Soo LEE 1 ; Sang Eun PARK ; Jung Uee LEE

Affiliations

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Keywords

Schwannoma; Plexiform; Thigh; Magnetic resonance (MR)

Country

Republic of Korea

Language

Korean

Abstract

Ancient schwannoma is a rare variant of schwannoma and a slow growing benign tumor associated with degeneration that may be diagnosed as a malignant tumor, because it presents with a large size and an inhomogeneous signal intensity. The main differential diagnosis of plexiform soft tissue tumor includes plexiform neurofibroma, malignant peripheral nerve sheath tumor (MPNST). In this case, we describe the MRI findings in a case of ancient schwannoma involving left thigh of a 63-year-old woman mimicking a plexiform MPNST. The tumor appeared as an inhomogeneous signal intensity and multinodular appearance, causing misdiagnosis as a plexiform MPNST.