CFB and primary central nervous system lymphoma: Especially, the relatively strong expression in the secondary CNS lymphoma (Sample 4) was observed, compared with that in the PCNSL (Sample 1–3), for M6B (1.34-fold), M8A (1.31-fold), and M9A (1.73-fold) in strong expression (average ratios 3.92–5.54%), and BA-1 (1.93-fold), A4G4F (1.81-fold), and GM9 (1.63-fold) in weak expression (average ratios 0.83–0.47%) (Fig. 4b).