A 44-year-old female known diabetic and hypertensive, presents to the clinic with mild pain in the epigastric area, bloating sensation and nausea often following intake of a large meal and gets relieved on lying down. She is not in distress; her abdomen is soft and flabby, and a 1.5 x 2 cm lump is felt in the epigastric region 1 cm to the left of the midline. What is the most appropriate step in management?