What is advanced ms?

See below. This discription likely reflects progressive stage disease with an accumulation of neurological disability.
End stage progress. Never want to wind up with any progressive form of MS, (tough to treat) and the potent initial meds such as Tysabri (natalizumab) or Gilenya are the best avenue to get the initial manifestations under control.
Advanced MS. This is the progressive and end stage of multiple sclerosis with many of the symptomatic problems noted in the course of the disease.