This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Which of the following testicular tumor is not a germ cell neoplasm - 
Select and explain. 
A. Seminoma, B. Yolk sac tumor, C. Sertoli cell tumor, D. Teratoma
C: Sertoli cell tumor
Answer: C: Sertoli cell tumor 
Explanation: Testicular tumor

Testicular tumors are divided into two major categories : -

Germ cell tumors : 
Seminoma        
Embryonal carcinoma 
Yolk sac (endodermal sinus) tumor
Spermatocytic seminoma   
Choriocarcinoma
Teratoma
Sex cord tumors :
Leydig cells tumor
Sertoli cell tumor

Approximately 95% of testicular tumors are germ cell tumors.