This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carcinoma Ovary, Subject name: Gynaecology & Obstetrics
[{'content': 'All of the following are features of Borderline tumors except: \nSelect and explain. \nA. Occurs in younger age, B. Mitotic figures <9/10 per high power filed, C. Very good prognosis, D. Stromal invasion seen', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is d, i.e. Stromal invasionRef: Shaw gynae 15th/ed, p373-374Malignant tumor has 2 characteristics different from borderline tumors:(i) Stromal invasion present (it is absent in borderline tumor).(ii) Mitosis >=4/10 per high power field, (in borderline <4/10 per high power)', 'role': 'assistant'}]