Efficacy of lenalidomide for relapsed or refractory T lymphoblastic lymphoma/leukemia after allogeneic hematopoietic stem cell transplantation.

To the Editor,T-cell lymphoblastic lymphoma (T-LBL) and T-cell acute lymphoblastic leukemia (T-ALL) with the proportion of bone marrow lymphoblastomas over 25% are highly aggressive malignancies de...