title: Malignant melanoma of the esophagus.
abstract: We have presented a case of malignant melanoma of the esophagus, which appeared to be a primary neoplasm. Characteristic clinical, histologic, and ultrastructural features are described. This lesion should be suspected clinically when a polypoid mass is found in the esophagus, even in the absence of pigmentation.
mesh_terms: D000368:Aged; D004938:Esophageal Neoplasms / Q000648:ultrastructure*; D004947:Esophagus / Q000473:pathology*; D006801:Humans; D008297:Male; D008545:Melanoma / Q000648:ultrastructure*; D008854:Microscopy, Electron