A patient’s death has prompted the FDA to place a partial clinical hold on Curis Inc.’s phase I/IIa study of emavusertib in leukemia. The patient, who had relapsed or refractory acute myeloid leukemia, experienced several conditions. One of them was rhabdomyolysis, a dose-limiting toxicity of emavusertib. Rhabdomyolysis is a breakdown of muscle fibers in the blood.