A 61-year-old woman comes to the physician for a 2-day history of intermittent vaginal bleeding. Menopause occurred at age 53. BMI is 22. Pelvic ultrasound shows a thickened endometrial stripe and a 1.6-cm mass in the right ovary. Which of the following is the most likely explanation for this patient’s acute presentation?
A) Dermoid cyst
B) Dysgerminoma
C) Endodermal sinus tumor
D) Mixed germ cell tumor
E) Sex cord stromal tumor
