There are so many things going on at the same time in the body of someone pushing themselves so far beyond human limits that it seems extremely unlikely you'd find a single neat cause for this. The bottom line is that they're destroying their bodies for athletic achievement, and most likely one too many things are pushed beyond a limit. The cure, or at least prevention, for them is simple - they should just stop doing this to themselves.
The fact that the vague array of symptoms matches your own possibly genetic symptoms doesn't mean much, most likely. Perhaps there are some similar biological mechanisms behind at least some of it, but perhaps not.
Of course, yes. I feel like the only solution to these odd disorders lay in personalized medicine. I feel like only looking at their genome will reveal the true cause and wills how the genetics that put them at risk. But theer could be some other environmental variables as well.
But they share enough of the same symptoms that they have already seemed to have narrowed it down to four possible causes. I never gave up on myself and I have come a long way, so I have hope for them.