The criteria considers MS as the presence of demyelinating lesions disseminated in time and space, and they are oriented specially to prove the dissemination. Based on this, the authors defined a set of rules that can yield five conclusions:[3] CDMS, LSDMS, CPMS, LSPMS or noMS. Poser diagnosis of CDMS is known to have a sensitivity of 87% respect postmortem autopsy examination[4]