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
[{'content': 'The commonest histological type of carcinoma testis is - \nSelect and explain. \nA. Teratoma, B. Yolk sac turom, C. Seminoma, D. Chorio carcinoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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', 'role': 'assistant'}]