Abstract
A 30-year-old male presented with a large calcified intraventricular mass. The tumor was completely resected via the transventricular route. Light microscopy showed the tumor was composed of small round cells with perinuclear halo, typical of oligodendroglioma. Electron microscopy revealed marked neuronal differentiation, including neurosecretory granules, well-formed numerous synapses, and lipofuscin granules. The tumor was diagnosed as well-differentiated central neurocytoma.
