The commonest histological type of carcinoma testis is -

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