The big question never answered in my family. I have three older (deceased) relatives who
had either a definite MS diagnosis or a suspected one (these suspected people were WAY
back, like great grandma). Because I do have a genetic disease, Porphyria, which is one of the many which mimic MS neurological problems, I may or may not have MS, but my dx has not been rescinded, as I had the positive MRI and eye tests when I had Optic Neuritis, and many symptoms during the decades before diagnosis. I have been on the Swank diet for over a quarter of a century and I know it has kept me functioning, but now I have other things like Polycythemia Vera which give me foot neuropathy.

So it's a mystery who in my family has it. My son doesn't show any signs to me.