As stated in the two other post MS is not a fatal disease. It is the complications that MS causes to a person that causes the demise of oneself. There are so many possibilities that one could list, it is not practable to do so, since every case is different. On the Kurtzke Espanded Disability Status Scale (EDSS), it has level one can use, HOWEVER it is just a guide NOT THE RULE. It goes from 0.0 to 10. At level 8.0:Essentally Restricted to bed or chair, or peraambuled in wheelchair, but may be out of bed itself much of the day; retrains many self care functions; generally has use of the arms. 8.5; Essentally restricted to bed much of the day, some effective use of the arms, retrains some self-care functions. According to multi-sclerosis.org/expandededdissabilitystatusscale.html  They years spent at level seven are approx. 4 years; the years spent at level 8 is approx. 2.75 years and at level 9 is approx. 3 years. For a grain of salt, some of the top neurologist rated me in my second year of MS at 8.0 to 8.5. That has been 9 years ago. There is not a preset toe tag on MS, you treat the symptoms and go on. It is a hard disease, I started of viral realated MS, secondary progession from day one. You keep on fighting and hoping. Some of my neurologist have stated that they have has patients with MS, where it went into a remission, however rare it happens. Keep the faith. Mircles do happen..GOD BLESS...John