“…1 However, despite promising results using targeted therapies in early-phase clinical trials, 2 nelarabine is currently the only FDAapproved drug for the management of R/R T-ALL. 3,4 With salvage chemotherapy response rates ranging from 15% to 25% and a 5-year survival <30%, R/R T-ALL represents a major unmet need for drug development. 5 Agents approved for R/R ALL are now being incorporated into front-line therapy, [6][7][8] which highlights the need for new treatment options if these patients subsequently relapse or prove refractory.…”