For instance, DLBCL in immune‐privileged sites, including the CNS and testes, as well as breast, uterine, and cutaneous DLBCL, are related to prevalent non‐germinal center B cell (non‐GCB) phenotype and MYD88/CD79B‐mutated genotype. The gene discussed is MYD88; the disease is diffuse large B-cell lymphoma.