FCER2 and follicular lymphoma: The pathologic features and mutation profile were consistent with t(14;18)-negative FL (i.e., FL with a predominantly diffuse growth pattern [dFL] in the 5th Edition of the World Health Organization Classification of Haematolymphoid Tumours and BCL2-rearrangement−negative, CD23-positive follicle center lymphoma [BCL2-R−negative CD23+ FCL] in the International Consensus Classification of Mature Lymphoid Neoplasms) [3, 11, 12].