ALK and anaplastic large cell lymphoma: The 5‐year OS was highest in anaplastic lymphoma kinase‐positive (ALK+) anaplastic large cell lymphoma (79.0%), followed by ALK−anaplastic large cell lymphoma (63.1%), natural killer/T‐cell lymphoma (57.7%), angioimmunoblastic T‐cell lymphoma (34.9%), and peripheral T‐cell lymphoma not otherwise specified (27.6%).