CD274 and malignant peripheral nerve sheath tumor: Of the 35 remaining patients with primary MPNST, DSS analysis revealed no survival correlates to PD-L1 or CD8 expression (PD-L1 5% criteria: NS, p=0.717; PD-L1 1% criteria: NS, p=0.342; CD8 5% criteria: NS, p=0.459; CD8 1% criteria: NS, p=0.938).