Ganglioneuroblastoma

**Semantic type:** Neoplastic Process

**Definition:** A malignant neuroblastic tumor characterized by the presence of neuroblastic cells, ganglion cells, and a stroma with Schwannian differentiation constituting more than fifty-percent of the tumor volume. There are two histologic subtypes identified: ganglioneuroblastoma, intermixed and ganglioneuroblastoma, nodular.

**Synonyms:** - GANGLIONEUROBLASTOMA, MALIGNANT