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Endoscopic, endoscopic ultrasonography (EUS), and gross findings of gastrointestinal stromal tumors (GISTs). A: Endoscopic view of a round subepithelial mass with a significant interval change; B: EUS shows an ovoid, homogeneous, hypoechoic mass in the fourth gastric wall layer; C: Gross findings of wedge resection reveal a soft, well-defined mass measuring 4.3 cm × 2.7 cm; D: Malignant potential.
