Ultrastructure of primitive neuroectodermal neoplasms of the central nervous system.

摘要: The ultrastructure of one spinal and five cerebral neoplasms diagnosed by light microscopy as primitive neuroectodermal tumors supports a cell population consisting largely poorly differentiated neuroepithelial cells. most unique feature was the presence annulate lamellae in four six cases. Glial cells neoplasm were not unequivocally neoplastic origin possible reactive. There no evidence neuroblastic or neuronal elements, although there frequently focal early differentiation microscopy. Although we have seen which are clearly neuroblastic, these particular purely should be classified neuroblastomas.