Abstract
A comparison of the 5-year relative survival rates has been made between cases of cancer of the uterine cervix treated with 226Ra low-dose-rate intracavitary irradiation and those treated with 60Co high-dose-rate intracavitary irradiation (using the remote afterloading system, RALS). External irradiation using LINAC was also administered in both groups. The 5-year relative survival rates of the low-dose-rate cases were 82.6, 55.4, 49.0, and 18.2% in stage I, II, III, and IV cases, respectively, whereas they were 97.4, 55.1, 56.8, and 29.0% in the respective high-dose-rate cases. The differences between the two groups were not statistically significant. Delayed radiation complications of the rectum were frequent in both groups (approximately 14%) and those of the urinary bladder were somewhat less frequent (approximately 8%). The incidence of such complications did not differ significantly between the two groups.
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