Primitive Neuroectodermal Tumor

**Semantic type:** Neoplastic Process

**Definition:** A malignant neoplasm that originates in the neuroectoderm. The neuroectoderm constitutes the portion of the ectoderm of the early embryo that gives rise to the central and peripheral nervous systems and includes some glial cell precursors.

**Synonyms:** - Neuroectodermal Neoplasm - Neuroectodermal Tumor - Neuroepithelioma - PNET - PNET - PNET, NOS - Primitive Neuroectodermal Neoplasm - Primitive Neuroectodermal Tumor (PNET) - Primitive neuroectodermal tumor, NOS - neuroectodermal tumor - primitive neuroectodermal tumor