Soft tissue
Peripheral nerve - malignant
Malignant triton tumor (MTT)


Topic Completed: 1 November 2012

Revised: 1 November 2019

Copyright: 2002-2019, PathologyOutlines.com, Inc.

PubMed Search: Malignant triton tumor


Vijay Shankar, M.D.
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Page views in 2020 to date: 401
Cite this page: Shankar, V. Malignant triton tumor (MTT). PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/softtissuempnsttriton.html. Accessed February 23rd, 2020.
Definition / general
  • MPNST with well developed skeletal muscle component
  • Diagnostic criteria of Woodruff (Cancer 1973;32:426):
    • Tumor arises along a peripheral nerve, in a ganglioneuroma, in NF1 patient, or is a metastasis from such a tumor
    • Tumor has characteristics of Schwann cell tumor
    • Rhabdomyoblasts arise from body of tumor
Case reports
Gross images

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Buttock mass

Microscopic (histologic) images

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Retroperitoneal tumor

Rhabdomyoblastic differentiation

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