BTG1 and diffuse large B-cell lymphoma: Among GCB‐type DLBCL NOS (n = 110), the frequency of SNV was as follows: PIM1 (n = 34, 30.9%), TP53 (n = 31, 28.2%), BTG1 (n = 25, 22.7%), HIST1H1E (n = 24, 21.8%), and EP300 (n = 24, 21.8%).