title: [Assessment of precancerous states of the esophagus in dynamic observation].
abstract: One hundred and thirty six patients with chronic lesions of the esophagus and stomach were observed dynamically for a 5-year period (with the use of fibroesophagogastroscopy). Twelve patients showed the esophageal cancer development: in 7 of 86 patients with chronic esophagitis and in 5 of 15 patients with leukoplakia. A high incidence of leukoplakia transition into cancer allows its being referrred to an obligate precancer of the esophagus. Atrophic esophagitis presents the background against which leukoplakia arises.
mesh_terms: D004938:Esophageal Neoplasms / Q000175:diagnosis* / Q000209:etiology; D004941:Esophagitis / Q000150:complications; D004945:Esophagoscopy; D006801:Humans; D007971:Leukoplakia / Q000150:complications; D011230:Precancerous Conditions / Q000175:diagnosis* / Q000209:etiology
vernacular_title: Otsenka predrakovykh sostoianiĭ pishchevoda pri dinamicheskom nabliudenii.