I have an idea for a story in the FreeRIDErs shared story universe which involves somebody developing some kind of fatal medical condition from which he can't recover, but which leaves his central nervous system and at least some other tissue intact for sampling.
The reason for this is because of how I want some DNA to be extracted from the intact non-nervous tissue and a map of the victim's central nervous system to be made from his intact brain and spinal cord.
I assume that the latter artifact could probably be constructed today by subjecting the nervous tissue in question to CLARITY, using a microtome to cut it into slices less than a millimeter thick, scanning these slices of neural tissue into a computer using some kind of electron microscope, and then analyzing these scans. After that, I would assume that such medical data would be saved somewhere from whence it could later be recovered and processed to recover the mental state and original body of the preserved victim.
The problem is that I'm not exactly sure what kind of medical condition would preserve only the tissue necessary for such an event to take place. I was considering using an accident of some kind to make it so that something like this could happen, but the probability that one of those would save the biological material needed for my story to progress would be quite low. Maybe my main character could already be dying for some reason? I'd need some kind of heritable or contractable disease to have struck him before the beginning of the story if that were to be the case, but I don't know about any conditions that might fit the bill. Maybe some auto-immune disease or lethal non-metastatic cancer could work? Anyway, I would greatly appreciate any ideas that those of you who see this question might have.