Endoscopic submucosal dissection combined with adjuvant chemotherapy for early-stage neuroendocrine carcinoma of the esophagus: A case report

Figure 1 Endoscopic images of the tumor. A: Gastroscopy demonstrated a disc-shaped protruding lesion of about 18 mm × 18 mm in size in the upper esophagus; B: Endoscopic ultrasonography demonstrated that the bulged lesion was highly echoic and homogeneous, originating from the muscularis mucosa.