[Modern perspectives of oral squamous cell carcinoma].

The article is devoted to the modern perspectives of the etiology, pathogenesis, diagnosis and prognostic factors in theoral squamous cell carcinoma. In the new edition of the WHO Classification of Head and Neck Tumors of 2017, the concept of potentially malignant diseases is introduced, which include erythroplakia, leukoplakia, oral submucous fibrosis, dyskeratosiscongenita, smokeless tobacco keratosis, palatallesions associated with reverse smoking, chronic candidiasis, lichen planus, discoid lupus erythematosus, syphilitic glossitis and actinic keratosis (liponly). A binary system for assessing oral epithelial dysplasia assessing is proposed. In Chapter 5, a separation of squamous cell carcinoma with a positive and negative reaction to human papillomavirus (HPV) is performed. It has been shown that patients with HPV positive squamous cell carcinoma have a better prognosis of the disease, which confirms the clinical distinction between oropharyngeal tumors and oral mucosa.