A positive EsoGuard test result indicates that targeted next-generation sequencing detected specific DNA methylation biomarkers associated with advanced precancerous changes—specifically Barrett's esophagus or high-grade dysplasia—in the esophageal cellular sample. This clinical finding suggests that the patient requires a follow-up diagnostic workup, typically a confirmatory traditional upper endoscopy performed by a gastroenterologist, to closely examine the lining of the esophagus.