piloid astrocytoma
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astrocytoma — A glioma derived from astrocytes. [G. astron, star, + kytos, cell, + oma, tumor] anaplastic a. intermediate grade a. characterized by increased cellularity, nuclear pleomorphism, mitoses, and variable … Medical dictionary
polar spongioblastoma — spongioblastoma polare a rare malignant brain tumor seen from childhood to young adulthood, characterized by palisades of unipolar spongioblasts; sites may be either cerebral or cerebellar. Called also piloid astrocytoma and unipolar s … Medical dictionary
