S837 Confirming the Concordance of LA Grade B Esophagitis With Gastroesophageal Reflux Disease on Reflux Quantification Testing

Introduction: The Lyon Consensus 2.0 included the diagnosis of Los Angeles (LA) grade B esophagitis as actionable, suggesting that an endoscopic diagnosis alone was sufficient for management without the need for quantitative reflux testing. However, given that symptoms of gastroesophageal reflux disease (GERD) may overlap with other esophageal disorders of gut-brain interaction, reflux quantification can help elucidate distinctions while also serving as another tool to confirm the severity of LA grade B esophagitis. Methods: A retrospective analysis was performed of consecutive patients between October 2022 and September 2023 who had both evidence of LA grade B esophagitis on esophagogastroduodenoscopy (EGD) and subsequent quantitative reflux testing (24-hour impedance monitoring and 48-hour wireless pH testing). Outcomes included the identification of test factors aligning with a positive pH study, including measurements of acid exposure time (AET), total number of reflux events, symptom index (SI), and symptom association probability (SAP). Results: Of the 169 patients with LA grade B esophagitis on EGD (N = 80 women, average age 55 years ± 15.9 years), 14 patients (8.2%) underwent subsequent reflux quantification testing off of acid-suppressive medications. There were no significant differences in mean age, sex, or smoking history between the patients who underwent reflux monitoring versus those who did not (N = 155). Twelve patients (85%) had wireless pH monitoring, while 2 (14%) had 24-hour impedance monitoring. Eighty-five point seven percent had a total AET score >6%, and 100% had an AET >5%. Most patients (71%) had more than 80 total reflux events. Eighty-five percent had an SI ≥50% while 64% had an SAP ≥95%, supporting positive symptom correlation for the majority of patients. Seventy-one percent of patients were recommended a change in therapy following testing, including medication escalation (50%) and referral for anti-reflux surgery (21%). Conclusion: In our cohort, there was a positive concordance between quantitative reflux testing and the presence of LA grade B on endoscopy. This study supports the concept of LA grade B as “actionable” reflux. Future studies with larger sample sizes could provide deeper insight as to the utility of EGD alone without quantitative reflux monitoring when referring to more invasive treatment options, such as surgery in patients with LA grade B esophagitis.