[Frequency of malignant tumors in Khanty-Mansiysk]

The variation statistics method was used to study the incidence of malignant tumors in the region, which is found to be infavourable in terms of opisthordiasis according to the data of medical reports within a 10-year period. It was shown that 29.7% of the population there died due to primary neoplasms, 27.8% of tumors being hepatic cancer. The analysis of the morbidity among aboriginals and migrants during three decades indicated that khanty and mansi suffered primary hepatic cancer 3 times as seldom and died, on the average, 9 years of age older than persons of other nationalities.