Of the 33 patients with primary MPNST who underwent R0 surgical resection, DFS did not correlate with PD-L1 nor CD8 expression (PDL1 5% criteria: NS, p=1; PDL1 1% criteria: NS, p=0.630, CD8 5% criteria: NS, p=0.553; CD8 1% criteria: NS, p=0.109). The gene discussed is CD8A; the disease is malignant peripheral nerve sheath tumor.