Burden of Intrapancreatic Fat Deposition in Type 2 Diabetes and the Role of Obesity: A Systematic Review and Meta-Analysis

Clinical Snapshot

Key Findings

• P Value: Statistically significant (p=0.010 after adjustment)

• Effect Size: SMD 1.13 (large effect size)

• Primary Outcome: Intrapancreatic fat deposition measured by MRI

• Nnt Or Sensitivity: Effect persisted after adjusting for BMI, liver fat content, and age (intercept=0.797, FDR-adjusted p=0.018)

• Confidence Interval: 95% CI 0.74 to 1.51

Clinical Application

Limited by requirement for MRI imaging, which may not be routinely available for pancreatic fat assessment Relevant to Australian diabetes management given high T2DM prevalence; MRI availability through public and private systems may support implementation in specialist endocrinology practice Adults with type 2 diabetes across multiple geographic regions and healthcare settings

Abstract

BACKGROUND: Growing evidence supports a role for high intrapancreatic fat deposition (IPFD) in the pathogenesis of type 2 diabetes mellitus (T2DM); however, the magnitude of this association and the extent to which it is influenced by body mass index (BMI), liver fat content (LFC), and age remain uncertain. OBJECTIVE: To quantitatively evaluate IPFD measured by magnetic resonance imaging (MRI) in individuals with T2DM and to investigate study-level factors contributing to between-study variability. METHODS: We systematically searched PubMed and Embase for observational studies comparing MRI-measured IPFD in individuals with T2DM versus non-diabetic controls, excluding studies in which IPFD quantification was performed using AI-based models. Pooled standardized mean differences (SMDs) were estimated using a restricted maximum likelihood approach with Hartung-Knapp adjustment. Heterogeneity was explored through subgroup, meta-regression, and sensitivity analyses. RESULTS: Thirty studies (n=3,980) were included. Individuals with T2DM had significantly higher IPFD than non-diabetic controls (SMD 1.13, 95% CI 0.74 to 1.51), with no significant differences when stratified by pancreatic region, MRI technique, geographic region, sample size, and risk of bias. In multivariable models, BMI remained the only consistent moderating covariate, and the excess IPFD in T2DM persisted after adjusting for BMI, LFC, and age (intercept=0.797, p=0.010, false discovery rate-adjusted p=0.018). Advanced heterogeneity exploration identified no structural outliers, and the pooled effect size remained consistent across multiple sensitivity analyses. CONCLUSION: T2DM is associated with substantially higher MRI-quantified IPFD, independent of study-level differences in BMI, LFC, and age. Although causality cannot be inferred, these findings support the hypothesis that IPFD may be involved in the underlying mechanism of T2DM. They also suggest that high IPFD could represent a metabolic hallmark, with potential implications for risk stratification and therapeutic targeting.

References

1. 1.Sul, H. H., Ahmad, S., Danpanichkul, P., Mantovani, A., Souza, M., & Petrov, M. S. (2026). Burden of Intrapancreatic Fat Deposition in Type 2 Diabetes and the Role of Obesity: A Systematic Review and Meta-Analysis. Current Obesity Reports. https://doi.org/10.1161/CIRCRESAHA.125.325517