A 58-year-old obese male with a 15-year history of GERD and poor PPI compliance presents for routine Barrett surveillance endoscopy. High-definition endoscopy with narrow-band imaging is performed. The structure marked **A** in the diagram—a distinct 4-cm circumferential salmon-pink columnar tongue extending 5 cm above the gastroesophageal junction—is identified. Targeted biopsies from an area of irregular mucosal and vascular pattern within this region show low-grade dysplasia (LGD) on histopathology, confirmed by two pathologists. Random Seattle protocol biopsies from the remainder of the Barrett segment show non-dysplastic intestinal metaplasia. Based on current Barrett endoscopic eradication guidelines, what is the most appropriate next step in management?