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
The commonest histological type of carcinoma testis is - 
Select and explain. 
A. Teratoma, B. Yolk sac turom, C. Seminoma, D. Chorio carcinoma
C: Seminoma
Answer: C: Seminoma 
Explanation: Tumors of the testis are a heterogeneous group of neoplasms that include germ cell tumors and sex cord stromal tumors. In postpubeal males, 95% of testicular tumors arise from germ cells, and all are malignant Seminomas are the most common type of germ cell tumor (~ 50% of germ cell tumors). robbins book of pathology 9th edition page 659 Most common tumor of the testis: Seminoma Mixed germ cell tumor Most common testicular tumor in infant and children up to 3 years: Yolk sac tumor Most common testicular tumor in prepubeal children: Teratoma Most common testicular tumor >60 years: Lymphoma Most common bilateral tumor Primary is seminoma Secondary is lymphoma