title: [Precancerous changes in esophageal cancer].
mesh_terms: D000818:Animals; D004938:Esophageal Neoplasms / Q000188:drug therapy / Q000473:pathology*; D004947:Esophagus / Q000473:pathology; D006801:Humans; D006965:Hyperplasia; D051379:Mice; D011230:Precancerous Conditions / Q000473:pathology*; D014801:Vitamin A / Q000494:pharmacology
chemical_list: D014801:Vitamin A