Concerning S63845, it has been reported that this BH3 mimetic is able to kill MCL‐1‐dependent cancer cells in vitro, including leukemia, lymphomas and MM cells [21, 28] and it synergized with ABT‐199 in T‐cell acute lymphoblastic leukemia (T‐ALL) [29]. This evidence concerns the gene MCL1 and Miyoshi myopathy.