CD274 and primary ciliary dyskinesia: The only work fully dedicated to this matter on TGCTs found PD-L1 immunoexpression in ICs occurring in 95.9% of SEs (higher frequency when comparing to our study, where 87.2% SEs evidenced PD-L1 IC staining) and that lower PD-L1 immunoexpression in ICs was associated with various adverse clinicopathological features and with worse progression-free survival [19].