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A Case Report of a Malignant Triton Tumor of the Left Retroperitoneum in a Young Female Without Neurofi bromatosis

Malignant peripheral nerve sheath tumors (MPNST) 
are malignant cancers with origins found within peripheral 
nerves of various body regions-most commonly involving the buttocks, thighs, brachial plexus and para-spinal region [1]. While MPNSTs account for only 5%-10% of all soft tissue sarcomas, there exist MPNST variations that occur with greater rarity [2]. Specifi cally, Malignant Triton Tumors (MTT) are a subset of MPNST with rhabdomyoblastic differentiation and account for only 5% of all MPNST cases [3].