Endoscopic resection of co-existing severe dysplasia and a small esophageal leiomyoma

Figure 3 Histopathologic findings. A: Esophageal leiomyoma arising from the muscularis mucosa (HE, 20 ×); B: Atypical cells in all three areas of the epithelium, but not full thickness, showed severe dysplasia (HE, 200 ×); C: The esophageal leiomyoma was negative for CD117 (C-Kit); D: The esophageal leiomyoma showed strong and diffuse positive staining for smooth muscle actin (200 ×).