Real-world treatment patterns of novel drugs in relapsed or refractory acute lymphoblastic leukemia patients in Japan

Aim: To evaluate treatment patterns of novel therapies (inotuzumab ozogamicin (inotuzumab), blinatumomab, and tisagenlecleucel) in patients with acute lymphoblastic leukemia (ALL) in a Japanese real-world setting. Patients & Methods: Patients with ALL diagnoses from a Japanese claims database were examined. Results: We included 194 patients (97 patients were prescribed inotuzumab; 97 patients were prescribed blinatumomab; and no patient was prescribed tisagenlecleucel); 81.4% in the inotuzumab group and 78.4% in the blinatumomab group were prescribed chemotherapy prior to the initiation of those drugs. Most patients were prescribed subsequent treatment (60.8 and 58.8%, respectively). A small number of patients were prescribed sequential treatment of inotuzumab-to-blinatumomab or blinatumomab-to-inotuzumab (20.3 and 10.5%, respectively). Conclusion: This study revealed inotuzumab and blinatumomab treatment features in Japan.