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Meta-Analysis
. 2017 Jul 24;12(7):e0180911.
doi: 10.1371/journal.pone.0180911. eCollection 2017.

Pancreatic size and fat content in diabetes: A systematic review and meta-analysis of imaging studies

Tiago Severo Garcia  1 , Tatiana Helena Rech  2 , Cristiane Bauermann Leitão  1   3
Affiliations
Meta-Analysis

Pancreatic size and fat content in diabetes: A systematic review and meta-analysis of imaging studies

Tiago Severo Garcia et al. PLoS One. .

Abstract

Objectives: Imaging studies are expected to produce reliable information regarding the size and fat content of the pancreas. However, the available studies have produced inconclusive results. The aim of this study was to perform a systematic review and meta-analysis of imaging studies assessing pancreas size and fat content in patients with type 1 diabetes (T1DM) and type 2 diabetes (T2DM).

Methods: Medline and Embase databases were performed. Studies evaluating pancreatic size (diameter, area or volume) and/or fat content by ultrasound, computed tomography, or magnetic resonance imaging in patients with T1DM and/or T2DM as compared to healthy controls were selected. Seventeen studies including 3,403 subjects (284 T1DM patients, 1,139 T2DM patients, and 1,980 control subjects) were selected for meta-analyses. Pancreas diameter, area, volume, density, and fat percentage were evaluated.

Results: Pancreatic volume was reduced in T1DM and T2DM vs. controls (T1DM vs. controls: -38.72 cm3, 95%CI: -52.25 to -25.19, I2 = 70.2%, p for heterogeneity = 0.018; and T2DM vs. controls: -12.18 cm3, 95%CI: -19.1 to -5.25, I2 = 79.3%, p for heterogeneity = 0.001). Fat content was higher in T2DM vs. controls (+2.73%, 95%CI 0.55 to 4.91, I2 = 82.0%, p for heterogeneity<0.001).

Conclusions: Individuals with T1DM and T2DM have reduced pancreas size in comparison with control subjects. Patients with T2DM have increased pancreatic fat content.

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Conflict of interest statement

Competing Interests: The authors declare that they have no conflicts of interest.

Figures

Fig 1
Fig 1. Search strategy used for study selection.
Fig 2
Fig 2. Flowchart of study selection.
Fig 3
Fig 3. Meta-analyses of studies evaluating pancreas by imaging in diabetes.
(A) Forest plot comparing pancreas volume (cm3) in type 1 diabetic patients with a control group. (B) Forest plot comparing pancreas volume (cm3) in type 2 diabetic patients with a control group. (C) Forest plot comparing fat content (%) in type 2 diabetic patients with a control group. WMD = weighted mean difference.
Fig 4
Fig 4. Bubble plot of the relation between diabetes duration (years) and pancreatic volume (cm3) in type 1 diabetic patients, including references [20, 34, 37].
WMD = weighted mean difference.
See this image and copyright information in PMC

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