Soft tissue
Peripheral nerve
Malignant
Malignant triton tumor


Topic Completed: 1 November 2012

Minor changes: 16 September 2020

Copyright: 2002-2020, PathologyOutlines.com, Inc.

PubMed Search: Malignant triton tumor


Vijay Shankar, M.D.
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Cite this page: Shankar, V. Malignant triton tumor. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/softtissuempnsttriton.html. Accessed November 30th, 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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