1 in 5 misdiagnosed with MS, study shows

Migraine would have been the most common correct diagnosis, say researchers

Almost one in five patients with an established multiple sclerosis diagnosis did not actually have the condition on closer examination by a specialist clinic, a study shows. 

On average, the patients were treated for MS for four years, usually with drugs, for a diagnosis that in many cases should have been migraine, the US researchers found.