ALK and anaplastic large cell lymphoma: More recently, in 2016, ALK- ALCL was included as a definitive entity and Breast Implant-Associated ALCL (BIA-ALCL) entered as a provisional entity in the WHO classification [11], finally being included as a definitive entity in the provisional 5th revision of the WHO classification (WHO-HAEM5) [12] and the most recent version of the International Consensus Classification (ICC) [13].