Palisades in cerebral astrocytoma simulating the so-called polar spongioblastoma: a histological, immunohistochemical, and electron microscopical study of an adult case.

: This report concerns a case of fibrous astrocytoma with palisade features that mimics a polar spongioblastoma. The patient was a 54-year-old female who presented with a tumor of the frontal lobe. The presence of neurites, with or without synaptic devices were considered to represent the entrapment by the tumors of the pre-existing neurons and their processes.