Click to identify the seminoma in the image below:

The mass lesion seen here in the testis is a seminoma. Germ cell neoplasms are the most common types of testicular neoplasm. They are most common in the 15 to 34 age group. They often have several histologic components: seminoma, embryonal carcinoma, teratoma, choriocarcinoma. The one that is most likely to be of one histologic type is seminoma, as in the testis seen here.