Help my sister help her son

Last night my sister took her son Santiago to the ER in Chico after not feeling well and complaining of headaches. They did a CT scan of his head and the dr saw a concerning mass on his brain. They were airlifted to Sacramento that night. Santi just got out of an MRI which will give us a better idea of what we are dealing with. Surgery is scheduled for Wednesday. Please, please say a prayer for my baby. Any help is greatly appreciated.