Pennies-on-a-plate cell in a pilocytic astrocytoma

Multinucleated astrocytes with peripherally situated nuclei like this one in a pilocytic astrocytoma
are referred to as having a "pennies-on-a-plate" configuration

This is a common "degenerative" change seen in long-standing pilocytic astrocytomas. I'm not sure from where this "pennies-on-a-plate" designation derives, but please leave a comment if you know.