MPNST
Malignant peripheral nerve sheath tumor
Most common site:sciatic nerve, brachial plexus, and sacral plexus
・10% of soft-tissue sarcomas
・40%–60% of MPNST arise from cases of NF1
・4% chance of malignant transformation in NF1
NF1:neurofibromatosis type 1
・5-year survival rate
50% for MPNST patients without NF1
10% for MPNST patients with NF1