Testicular Spermatocytic Tumor with Sarcoma

**Semantic type:** Neoplastic Process

**Definition:** A malignant germ cell tumor that arises from the testis and is characterized by the presence of a spermatocytic tumor component that is contiguous with an undifferentiated or differentiated sarcomatous component. It usually presents as a slowly growing mass that enlarges very rapidly soon after the initial diagnosis.

**Synonyms:** - Spermatocytic Tumor with Sarcoma - Testicular Spermatocytic Seminoma with Sarcoma