National Registry for Childhood Onset Scleroderma I: Insights from the first 341 juvenile localized scleroderma patients.

Objectives: There is an under recognition of juvenile-onset localized scleroderma and its extracutaneous manifestations leading to delay in systemic treatment. Our study aims to address this gap by describing the demographics, presentation, associated family history, concurrent autoimmune disease, extracutaneous manifestations, laboratory evaluation, treatment, and course of disease in juvenile-onset localized scleroderma patients enrolled in the National Registry for Childhood Onset Scleroderma.

Methods: Participants for this study were derived from the National Registry for Childhood Onset Scleroderma and included 341 patients with juvenile-onset localized scleroderma. Demographic, and prospectively collected outcome measures, such as the Localized Scleroderma Cutaneous Assessment Tool, physical exam findings, laboratory values, and patient-reported outcomes were reviewed.

Results: Most patients were female (71%), Caucasian (94%), had a linear subtype (56%), and had the onset of disease at age 7.5 (±4.2) years, and diagnosis 1.9 (±2.6) years after symptom onset. Most patients experienced at least one extracutaneous manifestation (70%), most commonly musculoskeletal (57%), followed by neurological (46%), and ophthalmological (11%). Those with musculoskeletal extracutaneous manifestation have significantly abnormal inflammatory and antibody laboratory values. Of patients with 1-year follow-up, a majority were treated with systemic therapy and globally improved with significant reduction in both modified Localized Scleroderma Skin Index (p < 0.001) and Localized Scleroderma Damage Index (p = 0.001).

Conclusion: The study highlights need for earlier recognition of juvenile-onset localized scleroderma after demonstrating the delay in diagnosis and frequent extracutaneous manifestations with significant disease burden in a juvenile-onset localized scleroderma cohort. The benefits of systemic treatment and full extracutaneous manifestation screening in juvenile-onset localized scleroderma is supported.