My Husband has cancer of the brain, and has had radation. two different doctors have said he has beginning alzheimers, one doctor said he's having brain seizures. since the doctors can't agree, how is a person supposed to know? our primary doctor, the one that knows us, says its alz. that it can start from any trauma to the brain, and he's certainly had that. the tumor is in the right front lobe (large tumor) where his thought process is located, thusly his radation was there too, as well as the hemotoma he suffered along with this. my SIL 's grandfather had alz. and he says its exactly the same. we have to drive, round trip, 200 miles to other doctors, and this routine of doctors is telling badly on him, should we accept the alz. diagnosis? can you tell me how people act when it starts? he's 67.