ALK and anaplastic large cell lymphoma: ALK+ ALCL tumors have a better outcome than other aggressive non-Hodgkin lymphomas, with a 5-year overall survival (OS) rate of 70% for adults and >90% for children [3,4,5,6,7,8,9,10]; however, the 2-year relapse rate remains at 30% [3,4,5,6,7,8,10,11].