“…1,2,26,27,[32][33][34] In LPHD, a single clone of lymphocytic and histiocytic cells, characterized as the descendant of a centroblast, is found in the different nodules of the lymphoma. 10,16,17 Although the detection of single clones of Ki67 ϩ cells encompassing 50% to 70% of the mutated Ki67 ϩ cells in 3 PTGCs may be suggestive of aberrant clonal expansions, such expansions are not unusual for classical GCs.…”