Pontine neurocytoma.

Pontine neurocytoma.

A case of neurocytoma arising in the rostral pontine region of an 18 year old man is reported. The patient developed a right trochlear nerve palsy and was shown to have a well circumscribed, contrast enhancing mass on magnetic resonance imaging. The tumour was characterised histologically by a uniform population of medium sized round nuclei and slightly eosinophilic cytoplasm or occasional peri...

Nonenhancing hypovascular extraventricular neurocytoma.

Neurocytoma We read with interest the case report by Yang et al. This was a nice presentation of 3 cases with extraventricular neurocytoma, which is a relatively rare tumor. The authors presented clinical, histopathologic, and immunohistochemical findings, along with the imaging characteristics. All tumors in their report showed marked enhancement. They concluded that this entity should be cons...

Pediatric Central Neurocytoma.

Central neurocytomas are well-differentiated tumors of neuronal origin. These are relatively uncommon in the pediatric population. Anaplastic features reflected by brisk mitotic activity, microvascular proliferation, necrosis, and MIB-1 labeling index >2% or 3% have been proposed to indicate aggressive behavior. Because of its rarity, there is paucity of data regarding the histologic spectrum a...

Neurocytoma - a rare intraventricular tumor.

Central neurocytoma with craniospinal dissemination.

We report a case of central neurocytoma that manifested tumor recurrence with craniospinal dissemination. Imaging studies before surgery showed a markedly enhanced tumor with small cysts and calcification, which invaded the adjacent brain parenchyma, located in the posterior horn of the right lateral ventricle. Proton MR spectroscopy showed markedly elevated choline and lactate peaks with a str...