PPP1R9A and primary central nervous system lymphoma: Taken together, by investigating the antigen-reactivity of previously published BCR sequences of PCNSL und PVRL cases, SAMD14/neurabin-I could be confirmed as common antigen in PCNSL and SEL1L3 was identified as a common PVRL antigen supporting the hypothesis of chronic antigenic stimulation as pivotal part of PVRL genesis.