Objective. To show the importance of regularity of preventive examinations in early diagnostics of ovarian cancer. Malignant ovarian tumors occupy the third place in the frequency of occurrence among the gynecological tumors after cancer of the uterine body and cervix but they leave them behind with regard to the mortality rate. Detection of the disease at late stages leads to only 17 % five-year survival rate in Europe and Russia.
 Materials and methods. A prospective study was conducted on the basis of the Gynecological Unit of Perm Regional Oncological Dispensary. It enclosed 50 patients aged 45 to 77 years, operated for ovarian cancer with various stages of the disease. The following methods were used: collection of complaints and anamnesis, study of outpatient cards and medical histories, assessment of morphological conclusions.
 Results. According to the anamnesis, all patients represented a risk group for ovarian cancer. The annual gynecological preventive examination was carried out in 40 % of patients, ultrasound examination of the pelvic organs was performed in 28 % of cases. The smallest group,10 % of patients, was a group of patients with stage I of the disease and asymptomatic course of pathology, who underwent preventive examinations and ultrasound in 100 % of cases. The largest number of patients had stage III 40 %, annual preventive examinations were carried out in 20 % of women of this group without ultrasound examination of the pelvic organs. In 64 % of cases, a late examination by a doctor was detected a year or more after the symptoms of the disease occurred. Patients with stages III and IV of the disease were postmenopausal, were unemployed and lived in rural areas.
 Conclusions. The absence of symptoms at an early stage of ovarian cancer and late onset of treatment with the complaints available actualizes the need for annual preventive gynecological examinations with mandatory ultrasound verification of the diagnosis to identify the disease in time.
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