This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological oncology, Subject name: Gynaecology & Obstetrics
[{'content': 'Indication for radiotherapy in carcinoma endometrium include all except : \nSelect and explain. \nA. Pelvic node involvement, B. Deep myometrial involvement, C. Enlarged uterine cavity, D. Poor differentiation', 'role': 'user'}, {'content': "Answer: C \nExplanation: Postoperative Radiotherapy in Endometrial cancer Stage Grade I & II Grade III IA Observation IV IB IV IM versus IV + CT II IV IM versus IV + CT II IM IM versus IV + CT IV: Intravaginal radiation IM: Intensuty modulated radiation therapy CT: Chemotherapy; Carboplatin + Paclitaxel Positive Lymph nodes : radiotherapy should be considered The postoperative radiotherapy is required in Stages IA (Grade 3), IA2, IB and II. Reference: Shaw's Textbook of Gynaecology 16th edition page 512", 'role': 'assistant'}]