Frequency of relapses of skin cancer after radiotherapy

Kinetics of skin cancer relapses after radiotherapy is studied. Data on the examination of 8207 patients treated with the radiotherapeutic method and retraced from 1 to 10 years including 678 patients with relapses present material for investigation. Close-distance roentgenotherapy has been carried out in 81% of patients, applicational therapy with radium - in 17%, associated roentgenotherapy and gamma-therapy - in 0.5%. The data analysis shows that there is a linear correlation between the initial number of relapses for 3, 2, and 1 year and their number for the subsequent period up to 10 years. The number of relapses for 1,2 and 3 years of retracing permits to forecast with reliability of 95% the total number of relapses for 3-5 and 10 years with an error of 2.6-1.5% respectively