Which of the following is FALSE regarding the endodermal sinus turmor:

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