This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pathology
Endodermal sinus tumor is characterised by 
Select and explain. 
A. Cal Exner body, B. Psammoma bodies, C. Schiller Duval bodies, D. Homer wright body
C: Schiller Duval bodies
Answer: C: Schiller Duval bodies 
Explanation: Refer Robbins page no 977Also known as endodermal sinus tumor, yolk sac tumor is of interest because it is the most common testicular tumor in infants and children up to 3 years of age. In this age group it has a very good prognosis. In adults the pure form of this tumor is rare; instead, yolk sac elements frequently occur in combination with embryonal carcinoma.