Central Neurocytoma in the Fourth Ventricle: A Case Report and Review of Cases With This Unusual Presentation Site.

Central neurocytoma (CN) is classified as a grade 2 neuronal tumor and is mostly located in the lateral ventricles. In this report, we present the case of a 40-year-old female patient who was admitted due to vertigo and a holocranial headache. Magnetic resonance imaging (MRI) revealed a lesion in the fourth ventricle that appeared heterogeneous and hyperintense. In the T2/fluid attenuated inversion recovery (FLAIR) sequence, numerous cystic areas were observed. Light microscopic examination showed a neoplasm with a neuronal phenotype; areas with neoplastic cells exhibiting a ganglionic appearance were noted, along with immunohistochemical expression of neuronal markers. Currently, the patient is showing clinical improvement.