Cognitive impairment occurs in approximately one-fifth of mildly disabled patients with MS and is associated with specific MRI disease measures. Assessment of cognitive function at diagnosis could facilitate the identification of patients who may benefit from therapeutic intervention with disease-modifying therapies to prevent further lesion development.

Patients with multiple sclerosis have significant atrophy of both white matter (WM) and gray matter (GM); secondary progressive patients have significantly more atrophy of both WM and GM than do relapsing-remitting patients and a significantly higher lesion load (abnormal WM fraction); lesion load is related to both WM and even more to GM atrophy; lesion load and WM and GM atrophy are significantly related to Expanded Disability Status Scale score and age at onset (suggesting that the younger the age at disease onset, the worse the lesion load and brain atrophy); and GM atrophy is the most significant MRI variable in determining the final disability.

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Objective: To evaluate Bacille Calmette-Guérin (BCG) effects after clinically isolated syndromes (CIS).Methods: In a double-blind, placebo-controlled trial, participants were randomly assigned to receive BCG or placebo and monitored monthly with brain MRI (6 scans). Both groups then entered a preplanned phase with IM interferon-b-1a for 12 months. From month 18 onward, the patients took the disease-modifying therapies (DMTs) that their neurologist considered indicated in an open-label extension phase lasting up to 60 months.Results: Of 82 randomized subjects, 73 completed the study (33 vaccinated and 40 placebo). Conclusions: Early BCG may benefit CIS and affect its long-term course.Classification of evidence: BCG, as compared to placebo, was associated with significantly reduced development of gadolinium-enhancing lesions in people with CIS for a 6-month period before starting immunomodulating therapy (Class I evidence). Neurology ® 2014;82:41-48 GLOSSARY BCG 5 Bacille Calmette-Guérin; CDMS 5 clinically definite multiple sclerosis; CI 5 confidence interval; CIS 5 clinically isolated syndrome; CSE 5 conventional spin-echo; DMT 5 disease-modifying therapy; EDSS 5 Expanded Disability Status Scale; Gd 5 gadolinium; IFN 5 interferon; MS 5 multiple sclerosis; RR 5 relative risk; T1W 5 T1-weighted; T2W 5 T2-weighted; TE 5 echo time; TR 5 repetition time.The majority of multiple sclerosis (MS) cases start with a first demyelinating episode (usually referred to as clinically isolated syndrome [CIS]) that is generally reversible. Approximately half of these cases convert to clinically definite MS (CDMS) within 2 years of the diagnosis and have substantial risk of disability, while about 10% of people with CIS remain free of further neurologic events, even in the presence of MRI compatible with MS.