‘Clinically definite benign multiple sclerosis’, an unwarranted conceptual hodgepodge: evidence from a 30-year observational study.

The article presents a study which assess the two definitions of clinically definite benign multiple sclerosis (CDBS). The study made use of the Disability Status Scale (DSS) to assess the disability of 874 patuents with definite relapsing-remitting MS. The result of the study shows that a long-term benign course of multiple sclerosis was failed to be ensured by the 10-year disability scores of DSS 2 or 3.