Brendan M McCleary1, Andrew T Trout2,3,4, Lin Fei5, Qin Sun5, Suraj D Serai6, Jonathan R Dillman1,7, Maisam Abu-El-Haija8,9. 1. Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., MLC 5031, Cincinnati, OH, 45229, USA. 2. Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., MLC 5031, Cincinnati, OH, 45229, USA. andrew.trout@cchmc.org. 3. Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA. andrew.trout@cchmc.org. 4. Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA. andrew.trout@cchmc.org. 5. Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. 6. Children's Hospital of Philadelphia, Philadelphia, PA, USA. 7. Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA. 8. Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA. 9. Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
Abstract
BACKGROUND: Pancreatic atrophy as a finding of chronic pancreatitis has largely been a subjective finding. Cross-sectional imaging should provide a means to quantify pancreatic atrophy. OBJECTIVE: The purposes of this study were to: (1) quantify pancreatic volume by magnetic resonance imaging (MRI) in a cohort of children without pancreatic disease, (2) define predictors of pancreatic volume and (3) assess the relationship between pancreatic volume and pancreatic fluid secretion. MATERIALS AND METHODS: This study involved further analysis of data collected as part of an institutional review board-approved prospective study of secreted fluid volume in response to secretin in 50 healthy children ages 6-16 years. The pancreas was manually segmented on axial MR images to calculate pancreatic volume. Pearson correlation or the Student's t-test were used to define associations between pancreatic volume and patient characteristics and previously calculated secreted fluid volume. Quantile regression was used to define the 5th percentile for pancreatic volume based on body surface area (BSA) [1]. RESULTS: Mean pancreatic volume was 46.0±18.8 mL with no significant difference based on sex (boys: 42.4±19 mL, girls: 49.1±18.3 mL, P=0.21). Pancreatic volume was moderately correlated with age (r=0.51, P=0.002) and strongly correlated with BSA (r=0.75, P<0.0001), with the 5th percentile for pancreatic volume defined by: (24.66×BSA) - 4.97. Pancreatic volume was moderately correlated with volume of fluid secreted after secretin administration (r=0.51, P=0.0002). CONCLUSION: We report increasing pancreatic volumes by MRI during childhood in a cohort of children without pancreatic disease. We have also shown that pancreatic volume is associated with secreted fluid volume as measured by MRI.
BACKGROUND:Pancreatic atrophy as a finding of chronic pancreatitis has largely been a subjective finding. Cross-sectional imaging should provide a means to quantify pancreatic atrophy. OBJECTIVE: The purposes of this study were to: (1) quantify pancreatic volume by magnetic resonance imaging (MRI) in a cohort of children without pancreatic disease, (2) define predictors of pancreatic volume and (3) assess the relationship between pancreatic volume and pancreatic fluid secretion. MATERIALS AND METHODS: This study involved further analysis of data collected as part of an institutional review board-approved prospective study of secreted fluid volume in response to secretin in 50 healthy children ages 6-16 years. The pancreas was manually segmented on axial MR images to calculate pancreatic volume. Pearson correlation or the Student's t-test were used to define associations between pancreatic volume and patient characteristics and previously calculated secreted fluid volume. Quantile regression was used to define the 5th percentile for pancreatic volume based on body surface area (BSA) [1]. RESULTS: Mean pancreatic volume was 46.0±18.8 mL with no significant difference based on sex (boys: 42.4±19 mL, girls: 49.1±18.3 mL, P=0.21). Pancreatic volume was moderately correlated with age (r=0.51, P=0.002) and strongly correlated with BSA (r=0.75, P<0.0001), with the 5th percentile for pancreatic volume defined by: (24.66×BSA) - 4.97. Pancreatic volume was moderately correlated with volume of fluid secreted after secretin administration (r=0.51, P=0.0002). CONCLUSION: We report increasing pancreatic volumes by MRI during childhood in a cohort of children without pancreatic disease. We have also shown that pancreatic volume is associated with secreted fluid volume as measured by MRI.
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