THURSDAY, June 9, 2016 -- A treatment combining chemotherapy and a stem cell transplant could represent a major advance against aggressive multiple sclerosis, experts say. This new treatment destroys the immune system with chemo and rebuilds it with the patient's own stem cells. Researchers say it stopped MS relapses and progression in 23 of 24 patients. According to the results of this small trial, these 23 patients no longer needed medication to control their MS. Moreover, eight showed continued improvement for nearly eight years. "These patients had highly active MS with lots of relapses and lots of ongoing damage to their brain, but we've been able to stop that," said lead researcher Dr. Harold Atkins.