title: [Development and diagnosis of precancerous conditions].
abstract: The Evolution and substantial diagnostic criteria of solar and radiogenic keratoses, tar- and oil keratoses, praecancerous lesions induced by arsenic, Bowen's dermatosis, as well as their leucoplacic counterparts in oral and genital mucosa and melanotic praeblastomatous lesions are described, aiming at early diagnosis and consequent early therapy.
mesh_terms: D006801:Humans; D007642:Keratosis / Q000150:complications; D008027:Light / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D009381:Neoplasms, Radiation-Induced / Q000175:diagnosis; D011230:Precancerous Conditions / Q000175:diagnosis*; D012878:Skin Neoplasms / Q000139:chemically induced / Q000209:etiology; D013472:Sunlight; D013638:Tars / Q000009:adverse effects; D013997:Time Factors
chemical_list: D013638:Tars
vernacular_title: Entwicklung und Erkennung der Praecancerosen.