Compared to WHO-HAEM4, there are two changes in the ICC but not in the WHO-HAEM5 concerning FL: (1) testicular FL is recognized as a distinct form of FL in young boys; and (2) BCL2-R-negative, CD23-positive follicle center lymphoma [3] is recognized as provisional entity (Table 1). The gene discussed is FCER2; the disease is intrahepatic cholangiocarcinoma.