This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Pathology
Schiller' Duval bodies is seen in - 
Select and explain. 
A. Choriocarcinoma, B. Embryonal cell Ca, C. Endodermal sinus tumour, D. Immature teratoma
C: Endodermal sinus tumour
Answer: C: Endodermal sinus tumour 
Explanation: Yolk sac tumors are the most common primary testicular neoplasm in children younger than 3 years of age; in this age group it has a very good prognosis. In adults, yolk sac tumors most often are seen admixed with embryonal carcinoma..A distinctive feature is the presence of structures resembling primitive glomeruli, the so-called Schiller Duvall bodies. ref : Robbins Basic Pathology, 9E,page-661