Testicular Neuroendocrine Tumor, Prepubertal-Type

**Semantic type:** Neoplastic Process

**Definition:** A rare, usually well-differentiated neuroendocrine neoplasm that arises from the testis. It usually affects adults, and a minority of patients have carcinoid syndrome. It may occur in isolation or, less frequently, be associated with testicular teratoma. The majority of cases are not associated with isochromosome 12p or germ cell neoplasia in situ. The clinical course is usually benign.

**Synonyms:** - Prepubertal Type Testicular Neuroendocrine Tumor - Prepubertal-Type Testicular Neuroendocrine Tumor - Testicular Carcinoid Tumor - Testicular Neuroendocrine Tumor, Prepubertal Type