Dad is stage 4 Hodgkin's survivor, had a seizure yesterday that was apparently due to dehydration, what could it be a sign of?

Been just over a year since he's been cancer free and he's been extremely healthy, exercising and eating well, was able to go back to his old lifestyle. Please no sugar coding, I'd appreciate just some raw truth as to what the seizure may be a sign of

LAN2019-10-03T14:16:41Z

Asking for a diagnosis here is pure idiocy. All you are doing is showing what an idiot you are. You said the problem was dehydration. Did a doctor tell you this or did you ask on quara? If you aren't bright enough to take these kind of problems to a doctor, then you deserve what you get.

lala2019-10-03T05:55:28Z

Yes cancer can have spread in his brain
He need a cat scan

Sasha2019-10-03T01:02:05Z

We all fear the worst, but I’m sure it’s not a reoccurrence. But, only his doctor and oncologist can tell you that for sure!

Anonymous2019-10-02T23:25:11Z

Report the seizure to the doctor who is following him, if you have not done so already.

Pippin2019-10-02T21:59:14Z

It could be a sign of any of a million things. Presumably he was taken to the ER. And will have a follow-up with his primary doctor or oncologist later this week or early next.