title: [Studies of pre-tumor (pre-cancer) period].
mesh_terms: D001706:Biopsy; D002278:Carcinoma in Situ / Q000175:diagnosis / Q000209:etiology; D002454:Cell Differentiation; D004848:Epithelium / Q000473:pathology; D005756:Gastritis / Q000150:complications; D006801:Humans; D009369:Neoplasms / Q000209:etiology*; D011230:Precancerous Conditions / Q000175:diagnosis / Q000473:pathology; D013274:Stomach Neoplasms / Q000209:etiology; D013997:Time Factors
vernacular_title: K ucheniiu o predopukholevom (predrakovom) periode