Fig. 7From: Primary malignant melanoma of the esophagus treated with subtotal esophagectomy: a case reportHistopathological characteristics of the PMME (hematoxylin and eosin (HE) staining). a The PMME shows a polyp-like intraluminal mass (HE ×10). b The tumor cell invasion directly involves the muscularis mucosae (HE ×25). c The tumor cells are spread horizontally in the basal layer of the esophageal epithelium, which is considered junctional activity (HE ×100)Back to article page