This study will be an open, non-randomised, clinical phase 2 trial, which will involve 30 women diagnosed with uterine papillary serous cancer. The researchers will investigate the effect of four cycles of paclitaxel/carboplatin, followed by whole pelvic external beam radiotherapy to a standard pelvis field (50.4 Gy) with or without a para-aortic boost with respect to the safety and efficacy of treatment, and patterns of recurrence.