This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endometrial Carcinoma and Hysterectomy, Subject name: Gynaecology & Obstetrics
Post operative radiotherapy in a patient operated for Ca-endometrium is indicated in all of the following EXCEPT: 
Select and explain. 
A. Deep myometrial invasion, B. Pelvic lymph node involvement, C. Enlarged uterine cavity, D. Poor tumour differentiation
C: Enlarged uterine cavity
Answer: C: Enlarged uterine cavity 
Explanation: Post operative radiotherapy in a patient operated for Ca-endometrium is indicated in: Deep myometrial involvement Grade 3 histology Lympho vascular space invasion extrauterine pelvic disease: adnexal, parametrial involvement Pelvic lymph node metatasis Para aoic lymph nodes Stage III and IV: whole abdomen radiation, but chemotherapy is preferred Serous, sarcomas, clear cell histology