Evaluation of the primary tumor size with MRI in the radiation therapy for uterine cervix cancer

In the radiation therapy for the uterine cervix cancer, the primary tumor volume is considered as an important prognostic factor. Therefore, we considered more objective method to evaluate the primary tumor, and measured tumor size with MRI. The distribution of tumor size varied in the each clinical stage. There was significant difference between less than 60 mm group and more than 60 mm group in tumor width in survival and in local control rate of clinical stage IIIb which was thought to be poor prognosis. As a result, we concluded that the evaluation of primary tumor size with MRI is a useful method to prospect prognosis prior to treatment.