Bim is crucial for mediating cell death in thymocytes, chronic lymphocytic leukemia, T acute lymphoblastic leukemia and multiple myeloma cells induced by glucocorticoids [14, 21, 49, 63, 158, 517-520], and its expression correlates with therapy response in lymphoid malignancies [518, 521, 522]. The gene discussed is BCL2L11; the disease is acute lymphoblastic leukemia.