Histologically confirmed high risk apparent FIGO stage I endometrial cancer.
Confirmation must be based on either a) diagnostic endometrial sampling or b) hysterectomy specimen if randomisation occurring after hysterectomy.
No prior anticancer therapy for endometrial cancer.
ECOG performance status 0-2.
Patients must be willing and able to complete quality of life questionnaires.
Patients cannot have grossly enlarged nodes, invasion of the cervical stroma, involvement of uterine serosa or metastatic disease outside the uterus on baseline radiological imaging.