Validation of Spleen Shear Wave Elastography for the Screening of High-risk Varices in Patients with Compensated Advanced Chronic Liver Disease

Objectives: Total number of avoided endoscopies using Baveno VI criteria is relatively low. Spleen elastography is an attractive tool and when compared with liver stiffness, it better represents the dynamic changes occurring in portal hypertension. The aim of the study was to evaluate spleen shear wave elastography (SWE) in compensated advanced chronic liver disease (cACLD) patients for ruling out the presence of esophageal high-risk varices (HRV). Methods: A total of 401 patients with cACLD were included in this cross-sectional study. The total sample was split into training set (200 patients) and validation set (201 patients). Spleen stiffness was measured with two-dimensional shear wave elastography (2D SWE). Esophageal HRV were defined as large varices (diameter >5 mm) or small varices with red color signs. In the training set, the receiver operating characteristic (ROC) curve was drawn and the area under the curve (AUC) of spleen SWE was assessed. A cutoff value was chosen (highest sensitivity and negative predictive value). In the validation set, the spleen SWE cutoff score and Baveno VI criteria were validated. Results: The prevalence of HRV was 12% in the training set and 13% in the validation set. Spleen SWE had an AUC of 0.89 in ruling out the presence of high-risk esophageal varices (cutoff value of 48.7 kPa, sensitivity of 100%, and specificity of 53%). Validating spleen SWE ?48.7 kPa in a different cohort of 201 cACLD patients, 55% of screening endoscopies could be avoided without missing any HRV, whereas using Baveno VI criteria only 30% of screening endoscopies could be spared. Conclusion: Spleen SWE ?48.7 kPa was able to identify cACLD patients who could safely avoid screening endoscopy with good accuracy. Spleen SWE could avoid an additional 25% of screening endoscopies compared to the Baveno VI criteria and no HRV were missed.

Barrett’s Esophagus: A Comparison Study between Two Cohorts of Gastroesophageal Reflux Disease

Introduction: Barrett’s esophagus (BE) is a complication of gastroesophageal reflux disease (GERD). It is seen among 15% of GERD patients as per a population-based study by Ronkainen et al. Barrett’s has malignant potential and annual progression to carcinoma depends on the presence or absence of dysplasia. There are various risk factors for the development of BE. We compared two symptomatic cohorts of GERD patients from the same geographical area who were evaluated for the presence of Barrett’s and various factors that can contribute to Barrett’s Materials and methods: Cross-sectional study. Two GERD cohorts, one from Kottayam and the other from Trivandrum were taken. The presence of Barrett’s and the factors contributing to the development of Barrett’s were analyzed between the two groups. Since biopsy data of all patients were not available, endoscopically suspected esophageal metaplasia (ESEM) was taken as Barrett’s Results: 415 patients were enrolled for the study (203 from Trivandrum and 212 from Kottayam). 192 females (99 from Trivandrum and 93 from Kottayam), and 223 males (104 from Trivandrum and 119 from Kottayam). Barrett’s esophagus and especially long-segment Barrett’s were significantly more common in Kottayam than Trivandrum (68 vs 22 and 36 vs 9) (p-value <0.001). Among the factors that were traditionally thought to contribute to the development of Barrett’s esophagus, age (>50 years) was not statistically significant among the two cohorts (mean age of Trivandrum was 48 years and Kottayam was 49 years). Duration of GERD symptoms was significantly more in the Trivandrum cohort compared to Kottayam (p-value <0.001). Hiatus hernia and body mass index (BMI) were more common in Kottayam. There were no statistically significant differences in erosive esophagitis and antral gastritis (%age?) between the two cohorts. Conclusion: Both Trivandrum and Kottayam belong to the same geographical area and are separated by a distance of only 150 km. The Kottayam cohort is more prone to develop distal esophageal carcinoma as the BE is more in Kottayam. This data also suggests the need for GERD registries so that high-risk population can be targeted and early intervention can lead to a decrease in the incidence of distal esophageal carcinomas.

Assessment of Visceral Fat Volume and Its Correlation with the Severity of Hepatic Fibrosis in Patients with NAFLD

Introduction: Nonalcoholic fatty liver disease (NAFLD) is one of the leading causes of chronic liver disease. The spectrum of NAFLD includes simple steatosis, nonalcoholic steatohepatitis (NASH), advanced fibrosis, and cirrhosis. Our study aimed to calculate visceral fat volume at the L3–L4 vertebral level and its association with hepatic fibrosis assessed by transient elastography. Methods: All patients above 18 years undergoing computed tomography (CT) abdomen in the Department of Radiodiagnosis of Medical College Thiruvananthapuram during the study period with NAFLD were included. Transient elastography was done. Patients were categorized to advanced fibrosis (>10 kPa) and without advanced fibrosis (<10 kPa). The area under the receiver operating characteristic (AUROC) curve was plotted. Results: Sixty-four patients comprised 36 males and 28 females. Thirty-one (46%) were having advanced fibrosis (transient elastography>10 kPa) and 34 (54%) patients were without advanced fibrosis. About 0.733 was the AUROC for visceral fat in predicting advanced fibrosis. The cutoff was 167.5cm3 (sensitivity was 77.4% and specificity was 51.5% in predicting advanced fibrosis). Conclusion: About 0.733 was the AUROC for visceral fat in predicting advanced fibrosis. The cutoff was 167.5cm3 (sensitivity was 77.4% and specificity was 51.5% in predicting advanced fibrosis).