This is an open-label, phase I-II dose-escalation and expansion study designed to define the recommended dose of brigatinib as monotherapy in pediatric and young adult patients with ALK+ ALCL, IMT or other solid tumors and to evaluate the pharmacokinetics (PK), (long-term) safety, and efficacy of brigatinib in these children.~Phase 1 part will be a dose escalation part using a rolling-6 design, aiming to accrue a minimum of 6 and a maximum of 18 evaluable patients in two dose-levels (and minus 1), at least 2/3 of included patients will be ≤18 years.~Phase 2 will be the tumor cohort expansion part of the study to further evaluate the safety, tolerability, and clinical activity/efficacy of brigatinib as monotherapy in two tumor-specific cohorts:~Cohort B1: ALK+ IMT Planned sample size for Phase 2 is 12 patients with IMT. Patients who are included in the monotherapy Phase 1 IMT dose-escalation portion of the study will be included in the expansion cohort analysis if they receive the RP2D, and will count towards the total sample size of 12 patients.~Cohort B2: ALK+ ALCL Planned sample size for Phase 2 is 22 patients with ALCL. Patients who are included in the monotherapy Phase 1 ALCL dose-escalation portion of the study will be included in the expansion cohort analysis if they receive the RP2D, and will count towards the total sample size of 22 patients.
This is an open-label, phase I-II dose-escalation and expansion study designed to define the recommended dose of brigatinib as monotherapy in pediatric and young adult patients with ALK+ ALCL, IMT or other solid tumors and to evaluate the pharmacokinetics (PK), (long-term) safety, and efficacy of brigatinib in these children.