A 62-year-old woman from Mumbai undergoes upper endoscopy for persistent epigastric pain and is found to have a 2 cm ulcerated lesion in the gastric body. Biopsies confirm intestinal-type adenocarcinoma. Staging CT shows no regional lymph node involvement and no distant metastases. Endoscopic ultrasound (EUS) confirms T2 N0 M0 disease. What is the most appropriate next step in management?

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