Clinical and diagnostic aspects of multiple sclerosis and acute monophasic encephalomyelitis in pediatric patients: a single centre prospective study.

Objective The purpose of the study was to compare and contrast the initial presenting demographic, clinical, neuroimaging, and laboratory features in a cohort of children affected from multiple sclerosis (MS) or acute disseminated encephalomyelitis (ADEM). Methods A 12-year prospective study was conducted in 68 pediatric patients (age = 17 years) who presented with a first episode of central nervous system inflammation suggestive of a demyelinating multifocal pathology. All patients had undergone magnetic resonance imaging (MRI) and cerebrospinal fluid (CSF) examination. The mean follow-up period, as at ending on December 31, 2007, was 6.8 +/- 2.7 years (range 3.2-12.6 years). Results At clinical onset, children who developed MS during the follow-up (48 patients; 34 females, 14 males; mean age at onset: 14.4 +/- 2.5) significantly differed from children affected by ADEM (20 patients; 8 females, 12 males; mean age at onset: 8.1 +/- 3.8) for the following parameters: prevalence of females affected (female/male ratio: 2.8 versus 0.6, P = 0.03); mean age at onset (P < 0.001); monosymptomatic onset (73% vs 30%, P = 0.002); encephalopathy-like onset (0% vs 50%, P < 0.001); presence of oligoclonal IgG bands (IgGOB) in CSF (83% vs 10%, P < 0.001); and periventricular (79% vs 20%, P < 0.001), brain stem (12.5% vs 60%, P = 0.000), and basal ganglia (10% vs 50%, P < 0.001) lesions at MRI. Conclusions Our findings depict a pattern of demographic, clinical, neuroimaging, and laboratory findings that can help to distinguish, at clinical onset, children suffering from ADEM from those who will develop MS. Childhood-onset MS seems not to differ from adult-onset MS from both clinical and paraclinical features. Multiple Sclerosis 2009; 15: 363-370. http://msj.sagepub.com