Not "officially" diagnossed yet but SCARED

My husband is 42 and always been healthy. The last several months he has been going to dr's to find the cause of his symptoms. I finally demanded a pet scan because they all suspected a cancer but couldn't locate one. They found a "large, dense calcification" within his pineal gland. He has a appt with a neurosurgeon on Thursday. I'm SURE this is when we will hear brain tumor for the first time. Pineal gland tumors are rare and held out hope it was a mistake. The chief neurosurgeon insisted on seeing him so my hope is turning into reality. Along with this brain tumor he is suspected of having sinus cancer as well. I dont have detailed information on type or stage but expect to have more knowlege when we leave his appt thursday. If anyone can help me with ?'s to ask I would appreciate it. I want to be as prepared as possible. I have a list of info already that as the dr speaks I can circle words that i hear in case I freeze and cant write.