This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ovarian Tumors and Vulvar cancer, Subject name: Gynaecology & Obstetrics
[{'content': '18 year old female presents with an ovarian mass, her serum LDH & placental alkaline phosphate are found to be elevated. What is the treatment of choice in this condition? \nSelect and explain. \nA. B/L oophorectomy & post op radiotherapy, B. Oophorectomy on the involved side, C. Only chemotherapy, D. Hysterectomy with bilateral salpingopherectomy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The given scenario suggests the diagnosis of Dysgerminoma Most common germ cell malignancy High risk: dysgenetic gonads, testicular feminisation syndrome Tumour markers: LDH, PLAP, (hcg may be raised in some but AFP is normal) In Dysgerminoma, conservative surgery (U/L Salphingo-Oophorectomy) recommended as most patient are Young girls Post operative Chemotherapy gives 90% success NOTE: bilateral salpingo-oophorectomy is not done here in order to conserve ovarian function and feility unless mentioned that the presentation is bilateral.', 'role': 'assistant'}]