Thanks. Anyway I think the most common problem is the opposite. They describe how people looking for a MS diagnosis is diagnosed other more specific thing. Nevertheless, I think is normal that some lazy doctors do not prescribe enough tests, and non-MS patients end up being diagnosed with an unexistant MS disease.
Unfortunately MS is currently considered as a box in which to dump anything that does not fix somewhere else.
Please fight against the MS section of the new ICD 11 at http://apps.who.int/classifications/icd11/browse/f/en