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Pronunciation: spun'je-o-blas-to'ma


  1. A glioma consisting of cells (elongated, spindle-shaped, and sometimes pleomorphic, with one or two fibrillary processes) that resemble the embryonic spongioblasts, occurring normally around the neural canal of the human embryo; it grows relatively slowly, usually originating in the brainstem, optic chiasm, or infundibulum; infiltrates adjacent structures or causes compression of the third and fourth ventricles. Spongioblastomas were formerly subclassified as spongioblastoma polare and spongioblastoma unipolare.
  2. Obsolete term for glioblastoma multiforme.

[spongioblast + G. -oma tumor]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.