Recurrent mutations in genes such as KMT2C, KMT2D, NOTCH2, TRAF3, CCND1, ARID1A, CREBBP, and TP53 were observed, with TRAF3 mutations standing out for their significant association with prolonged progression-free survival and overall survival in B-cell lymphomas. The gene discussed is KMT2D; the disease is B-cell non-Hodgkin lymphoma.