Visceral adiposity predicts post-operative Crohn's disease recurrence

Area of Science:

• Gastroenterology and Hepatology
• Surgical Gastroenterology
• Clinical Nutrition and Metabolism

Background:

• Excess visceral adipose tissue is linked to adverse outcomes in inflammatory bowel disease (IBD) patients.
• Understanding body composition's role in post-operative Crohn's disease (CD) is crucial for patient management.

Purpose of the Study:

• To investigate the association between body composition and outcomes in post-operative Crohn's disease patients.
• To determine if visceral adipose tissue predicts disease recurrence following surgical resection.

Main Methods:

• The POCER study prospectively analyzed 44 post-operative Crohn's disease patients.
• Body composition was assessed using cross-sectional abdominal imaging, measuring visceral adipose tissue (VAT), subcutaneous adipose tissue (SAT), and skeletal muscle area.
• Patients were randomized to early endoscopy with treatment escalation or standard care, with endoscopic recurrence at 18 months as the primary endpoint.

Main Results:

• Elevated visceral adipose tissue (VAT/height² > 1.5 times gender-specific mean) was associated with significantly higher endoscopic recurrence rates (100% vs. 47%).
• Visceral adipose tissue showed a strong correlation with waist circumference (ρ = 0.840, P < 0.001).
• Low skeletal muscle mass (sarcopenia) was prevalent (41%) and inversely correlated with fecal calprotectin (ρ = 0.560, P = 0.046), indicating a link with inflammatory biomarkers.

Conclusions:

• Visceral adiposity is an independent risk factor for endoscopic recurrence of Crohn's disease after surgery.
• Sarcopenia correlates with inflammatory biomarkers, suggesting its role in disease activity.
• Measuring visceral adipose tissue may improve risk stratification in the post-operative management of Crohn's disease.