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[Electron microscopic observations of ependymoblastoma (author's transl)].

The fine structure of an ependymoblastoma was examined and compared to normal ependyma, ependymoma and to developing neural tube. As in the ependymoma, the tumor cells formed compact masses as well as rosettes and the blood vessel-associated pseudorosettes. In general, the cells appeared primitive but displayed well developed junctional devices in some areas as well as ciliary basal bodies. In many respects, the tumor cells resembled the cells forming the developing neural tube.