Rosette Neurocytic rosette 2018-07-04T13:32:31Z Pineocytomas and central neurocytomas represent well-differentiated neuronal neoplasms with small rounded nuclei, analogous to those normally encountered in the internal granular layer of the cerebellum or the dentate fascia of the hippocampus. Although they likely originate from slightly different precursors, the histologic features of these two tumors are virtually identical, including their tendency to form neuropil-rich rosettes, referred to as pineocytomatous rosettes in pineocytomas and neurocytic rosettes in central neurocytoma Pineocytomatous rosette A type of rosette that is similar to the Homer Wright rosette, but the central fiber-rich neuropil island is larger and more irregular.