CD8A and rhabdomyosarcoma: PD-L1 expression correlated with better EFS, overall survival (OS) and metastases-free survival (MFS) in alveolar rhabdomyosarcoma (EFS: p = 0.009, OS: p = 0.049, MFS: p = 0.032) (Figure 3A–3C) and there was a trend towards better EFS for combined PD-L1 and CD8 expression (p = 0.069) (Figure 3D).