Son has been diagnosed with a cancerous brain tumour - I'm so worried for him.

My son has just been told he has brain cancer following a 1st MRI- we have waited 2 weeks since a 2nd profusion MRI for a clinical appt and they think this will start with surgery; so more waiting for that.  I am so worried for him. Any good news stories or hope will help but I know  no one can tell me the outcome.