ALK and anaplastic large cell lymphoma: Among systemic T-cell NHL, 40 patients had a diagnosis of ALCL (ALK negative, N = 21 or ALK positive, N = 19), PTCL-NOS (N = 20), AITL (N = 9), T-cell lymphoblastic lymphoma (N = 3), enteropathy-associated T-cell lymphoma (N = 2), hepatosplenic T-cell lymphoma (N = 1).