睾丸中见到肿块病变是精原细胞瘤。生殖细胞肿瘤是睾丸肿瘤中最常见的类型。在15～34年龄段中最常见。通常有以下几种组织学构成：精原细胞瘤、胚胎癌、畸胎瘤、绒毛膜癌。精原细胞瘤是最可能只有一种组织学类型的，如这个睾丸中所见。
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.
