Prognostic indicators in pediatric clinically isolated syndrome.

Area of Science:

• Neurology
• Pediatric Neurology
• Neuroimmunology

Background:

• Pediatric clinically isolated syndrome (pCIS) is the initial presentation suggestive of multiple sclerosis (MS) in children.
• Identifying prognostic factors is crucial for early intervention and management of pediatric MS (POMS).

Purpose of the Study:

• To determine predictors of a second clinical attack and the first disability-worsening event in pediatric patients with CIS.
• To evaluate the impact of disease-modifying drug (DMD) treatment on disease course.

Main Methods:

• A cohort of 770 pediatric CIS patients was followed for over 10 years.
• Cox proportional hazard models and Recursive Partitioning and Amalgamation (RECPAM) were employed for data analysis.
• Analysis focused on identifying risk factors for clinical attacks and disability progression (Expanded Disability Status Scale - EDSS).

Main Results:

• In pCIS, female sex and multifocal onset were associated with an increased risk of a second clinical attack, while DMD exposure showed a protective effect.
• After POMS diagnosis, younger age at onset (<15 years) and DMD exposure reduced the risk of a first EDSS-worsening event.
• Relapse occurrence significantly increased the risk of EDSS worsening, and DMD exposure was confirmed as the most protective factor.

Conclusions:

• This study identifies key predictors of disease course in pediatric CIS and POMS.
• Early initiation of DMD treatment demonstrates a protective effect against MS development and disability accumulation in this pediatric population.