A Study to Assess the Safety and Tolerability of AZD1390 Given With Radiation Therapy in Patients With Brain Cancer

35 Gy of Intensity-modulated radiation therapy (IMRT) administered at daily fractions of 3.5 Gy over 10 fractions (2 weeks)

"AZD1390 Administered in 3 Cycles depending on arm:~Cycle 0: 1 dose prior to Radiation Therapy. Cycle 1: 2 weeks Intermittent or continuous dosing during Radiation Therapy. Cycle 2: 2 weeks adjuvant treatment after Radiation Therapy. For optional food effect assessment in Arm A, 2 doses prior to RT under both fed and fasted conditions. Note: the food effect assessment is currently open to recruitment.~Arm A includes the Japan part following the same dosing administration."

30 Gy of whole brain radiation therapy (WBRT) or partial brain radiation therapy (PBRT) administered at daily fractions of 3 Gy over 10 fractions (2 weeks).

60 Gy of intensity- modulated radiation therapy (IMRT) administered at daily fractions of 2 Gy over 30 fractions (6 weeks)

AZD1390 administered in 1 Cycle. AZD1390 administration concomitantly with RT (2 weeks). Cycle 1 also contains an additional 5 days (post completion of RT with AZD1390 administration). Arm is Closed.

"AZD1390 Administered in 3 Cycles depending on arm:~Cycle 0: 1 dose prior to Radiation Therapy. Cycle 1: 6 weeks Intermittent or continuous dosing during Radiation Therapy. Cycle 2: 2 weeks adjuvant treatment after Radiation Therapy. Arm is closed."