Prevalence of radiologically isolated syndrome in a pediatric population-based cohort: A longitudinal description of a rare diagnosis

C L de Mol, A L Bruijstens, P R Jansen, Mhg Dremmen, Yym Wong, A van der Lugt, Tjh White, R F Neuteboom
Multiple Sclerosis: Clinical and Laboratory Research 2021 January 22, : 1352458521989220

BACKGROUND: Radiologically isolated syndrome (RIS) is typified by multiple sclerosis (MS)-like lesions on imaging, without clinical MS symptoms. The prevalence of pediatric RIS is largely unknown.

OBJECTIVE: The objective of the study is to provide an estimated RIS prevalence in a population-based cohort of children.

METHODS: We used data from the Generation R study to identify the childhood RIS prevalence.

RESULTS: In 5238 participants, only one RIS case was identified (prevalence: 0.02%; 95% confidence interval (CI): 0.00-0.11). During a 62-month follow-up, imaging examinations showed accrual of new focal demyelinating lesions; however, no clinical MS symptoms occurred.

CONCLUSIONS: This study shows that the occurrence of RIS in children from the general population is rare.

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