A melanoma affecting the esophageal wall. Melanoma in the esophagus is more commonly metastatic than primary. Primary melanomas of the esophagus are polypoid and clinically aggressive. (WHO, 2000). The disease is esophageal melanoma (Monarch Disease Ontology identifier MONDO_0001192). Also known as: esophagus melanoma, esophagus melanoma (disease), melanoma (disease) of esophagus, melanoma (disease) of oesophagus, melanoma of esophagus, melanoma of oesophagus, melanoma of the esophagus, melanoma of the oesophagus.