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
Which of the following is FALSE regarding the endodermal sinus turmor: 
Select and explain. 
A. Malignant germ cell tumor of the ovary, B. Schiller- Duval body is the characteristic histological feature, C. Produces hCG which is a useful tumor marker, D. Surgical staging and unilateral salpingooophorectomy is generally the treatment of choice
C: Produces hCG which is a useful tumor marker
Answer: C: Produces hCG which is a useful tumor marker 
Explanation: Endodermal sinus tumor (yolk sac tumor) Unilateral & mostly observed between 15-20 yrs of age. Median age of presenation is 16 - 18 years. Its the third most common malignant germ cell tumor of the ovary (most common germ cell malignancy is Dysgerminoma) The characteristic histological feature-Schiller-duval body is seen in EST Most tumors produce Alpha feto protein and rarely Alpha1 antitrypsin. AFP is used for monitoring patient response to treatment. Treatment of choice- Surgical staging and Unilateral Salpingo-oopherectomy All patients have to be treated with adjuvant or therapeutic chemotherapy