A benign neoplasm that involves the esophagus. The disease is MONDO_0021459 (benign neoplasm of esophagus). Also known as: benign esophageal neoplasm, benign esophageal tumor, benign esophageal tumour, benign esophagus neoplasm, benign esophagus tumor, benign neoplasm of the esophagus, benign neoplasm of the oesophagus, benign oesophagus neoplasm.