Abstract:
:Two patients, 14 and 46 years of age, presented with diffuse, rapidly growing intracerebral tumors leading to death 6 1/2 and 9 1/2 months, respectively, after diagnosis. Histological examination showed sheets of moderate-sized tumor cells with clear cytoplasm and central nuclei interrupted by delicate arciform vasculature, an appearance distinctly different from that of neuroblastoma. Malignant features were present in the form of significant nuclear pleomorphism, numerous mitotic figures, and small foci of necrosis with some suggestion of adjacent pseudo-palisading in one case. Ultrastructural examination showed neuronal differentiation, including prominent neuritic processes, microtubules, dense-core neurosecretory-type granules, and synaptic bouton-like structures containing small, empty-appearing synaptic-type vesicles and synapse-like membrane "thickenings." Immunohistochemistry showed focal immunopositivity for synaptophysin, neurofilaments, neuron-specific enolase, and S100 protein. Immunoreactivity for glial fibrillary acidic protein (GFAP) was found at the margins of the tumors adjacent to some intratumoral blood vessels and in some tumor cells. These tumors seem to occupy a nosological "middle ground" between neuroblastoma and central neurocytoma.
journal_name
Hum Patholjournal_title
Human pathologyauthors
Mrak REdoi
10.1016/0046-8177(94)90242-9subject
Has Abstractpub_date
1994-08-01 00:00:00pages
747-52issue
8eissn
0046-8177issn
1532-8392pii
0046-8177(94)90242-9journal_volume
25pub_type
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