There is a growing number of patients with malignant tumors of nasal cavity and paranasal sinuses. Majority of patients with this pathology are hospitalized with III-IV cancer stages. There is no tendency to decrease the advanced stage of cancer. The efficiency of patients" treatment can be increased by early diagnostics. The main reason of delayed diagnostics is insufficient oncologic alarm in primary health care. While the background prodromic cancer processes are morphologically detected in

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... 6.7 % of patients, the issues of treatment policy during cavity and paranasal sinuses premalignancy are still unsettled. Chronic polypous rhinosinusitis is one of the most frequent background process of cancer of nasal cavity and paranasal sinuses. Rhinosinusitis morbidity is high; the growth of its incidence is 2-4 % per year in the last decade. There are few works, considering polypous rhinosinusitis as premalignant condition.