From the case:
Pineoblastoma (gross pathology)
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An autopsy specimen showing a rather large pineal tumor. It was a pineoblastoma composed of highly cellular sheets of anaplastic cells with irregular hyperchromatic nuclei and brisk mitotic activity – resembling medulloblastoma and retinoblastoma.
Case Discussion
Case reproduced with permission, courtesy of Dr. Dharam M. Ramnani, Webpathology.com (original case is here). All rights reserved; please see original case for copyright information.