Endoscopic diagnosis of early-stage primary esophageal small cell carcinoma: Report of two cases

Figure 2 Findings of endoscopic examination (Case 2). A: An esophageal submucosal tumor diagnosed by endoscopy at a local hospital; B: Mucosal hyperemia and erosion on the surface of the tumor about 2 wk later; C: Narrowband imaging showed that a portion of the depressed area was slightly brownish; D: The hyperemic and erosive mucosa of the tumor was unstained after iodine staining; E: Endoscopic ultrasonography (20 MHz) showed a hypoechoic mass in the muscularis mucosa; F: The tumor was about 7.4 mm × 2.9 mm in size.