Thirty‐four of 113 (30%) lymphomas harbored both MYD88 and CD79B mutations and were found in the breast (2/4; 50%), CNS (13/26; 50%), ENT (10/28; 36%), skin (5/16; 31%), testis (2/7; 28%), stomach (1/10; 10%), and PMBL (1/12; 8%). This evidence concerns the gene CD79B and lymphoma.