PDCD1 and nasopharyngeal carcinoma: It has been demonstrated that PD-1 and AFAP1-AS1 (Actin filament-associated protein 1 antisense RNA 1) were co-expressed in the infiltrating lymphocytes of nasopharyngeal carcinoma tissues and patients with co-expression of AFAP1-AS1 and PD-1 had poor survival 34.