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What is Which of the following testicular tumor is not a germ cell neoplasm - and explain in detail?
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.