The Changing Face of Pediatric Ulcerative Colitis: A Population-based Cohort Study

Area of Science:

• Gastroenterology
• Pediatric Gastroenterology
• Inflammatory Bowel Disease Research

Background:

• Ulcerative colitis (UC) in pediatric patients presents unique challenges.
• Understanding the initial phenotype and disease course is crucial for effective management.
• Early identification of severe disease predictors can guide therapeutic strategies.

Purpose of the Study:

• To characterize the phenotype of pediatric ulcerative colitis at diagnosis and during follow-up.
• To identify predictors associated with a severe disease course in children with UC.
• To analyze treatment patterns and surgical risks in this population.

Main Methods:

• Retrospective, single-center study of 111 patients diagnosed with UC between ages 2 and 18.
• Data collection included clinical and laboratory features at diagnosis, disease extent, atypical phenotypes, extraintestinal manifestations, and therapies.
• Follow-up data analyzed relapse rates, disease extension, and cumulative risk for colectomy.

Main Results:

• Nearly half (49.5%) of pediatric UC patients exhibited atypical phenotypes at diagnosis.
• Extraintestinal manifestations were present in 14.4% of patients.
• Steroid refractoriness (HR: 13.9) and initiation of biologic therapy (HR: 25.3) were significant predictors of surgery. Cumulative colectomy risk was 16% at 10 years. Relapse rates were high, with 63% experiencing a first relapse within 1 year.

Conclusions:

• Pediatric ulcerative colitis is frequently associated with a severe phenotype and a high prevalence of atypical features.
• While surgery rates may be decreasing compared to historical data, aggressive disease courses are common.
• Predictive factors for surgical intervention highlight the need for close monitoring and potentially earlier escalation of therapy in high-risk children.