LEF1 and B-cell chronic lymphocytic leukemia: A recent review examined the expression of LEF1 in a group of 117 Hodgkin lymphomas, which consisted of 66 cases of classic Hodgkin lymphoma (CHL), 27 cases of nodular lymphocyte-predominant Hodgkin lymphoma (NLPHL), and 24 cases of Richter transformation of CLL/SLL to CHL [10].