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Endoscopic and endoscopic ultrasound (EUS) image of different esophageal granular cell tumors (GCTs). (a) Small yellowish peanut-like half protrusion under the smooth overlying mucosa. (b) A submucosal knurl with a small tuberculum. (c) EUS view of esophageal GCT (mildly heterogeneous solid pattern originating from the muscularis mucosa layer).
