A comparative study of the pancreas in pediatric patients with cystic fibrosis and healthy children using two-dimensional shear wave elastography

Abstract

To compare sonographic parameters of the pancreas between healthy children and pediatric cystic fibrosis (CF) patients with pancreatic involvement using shear wave elastography (SWE) and to investigate the efficacy of SWE in the diagnosis of pancreatic involvement in pediatric CF patients. The pancreas was evaluated in 38 patients with CF and 38 healthy children using conventional B-mode ultrasonography (US) and two-dimensional (2D)-SWE. The pancreatic 2D-SWE values of the CF group were significantly lower than those of the healthy control group (1.01 ± 0.16 vs. 1.31 ± 0.01m/s for the head, 1.03 ± 0.05 vs. 1.28 ± 0.08m/s for the pancreatic body, and 1.02 ± 0.05 vs. 1.30 ± 0.10m/s for the tail; p < 0.005 for all the comparisons). When the threshold values were obtained for the pancreatic head, body, and tail segments for the differentiation of the CF patients and healthy controls, the sensitivity of the test was determined as 81.5%, 76.3%, and 73.3%, respectively, and the specificity as 97.3%, 100%, and 100%, respectively. When the patients were divided into two groups based on the presence of B-mode US characteristics (homogeneity, sharp demarcation, and hyperechoic pancreas), there was a significant difference in the 2D-SWE values of the pancreatic head between the patients with and the patients without these characteristics (p = 0.048 for homogeneity, p = 0.021 for sharp demarcation, and p = 0.006 for hyperechoic pancreas). The measurement of 2D-SWE values was found to be an easily applicable non-invasive test with high sensitivity and specificity for the demonstration of changes in the pancreas of pediatric CF patients.