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CC BY-NC-ND 4.0 · Indian Journal of Neurosurgery 2021; 10(02): 144-147
DOI: 10.1055/s-0041-1727546
Short Communication

Extraventricular Neurocytoma in Parietal Lobe

Katherine Gallego-Henao
1   Department of Neurosurgery, Centro Médico Nacional “20 de Noviembre” Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado (ISSSTE), Mexico City, México
,
José M. Ramos-Delgado 
1   Department of Neurosurgery, Centro Médico Nacional “20 de Noviembre” Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado (ISSSTE), Mexico City, México
,
Angelica Moreno-Blanco
2   Department of Pathology, Centro Medico Nacional “20 de Noviembre” Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado (ISSSTE), Mexico City, México
,
Aureliano Placido-Méndez
2   Department of Pathology, Centro Medico Nacional “20 de Noviembre” Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado (ISSSTE), Mexico City, México
,
Antonio Zarate-Mendez
1   Department of Neurosurgery, Centro Médico Nacional “20 de Noviembre” Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado (ISSSTE), Mexico City, México
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Abstract

Extraventricular neurocytoma (EVN) was classified as a World Health Organization (WHO) grade II tumor; however, EVN is not fully understood; it presents a variable histological feature that included oligodendroglioma-like, neuropil-like matrix, ganglion or gangloid cells, perivascular pseudorosettes, vessel hyalinization, calcifications, and myxoid degeneration. In some very rare cases, atypical histological features such as increased mitotic figures, focal necrosis, endothelial cell proliferation, and Ki-67 index of >2% made this tumor more aggressive and more susceptible to recur. We present the case of a young patient who presents with a 2-year history of seizure without other symptoms. Magnetic resonance imaging reveals a parietal lobe and well-circumscribed lesion treated by gross total resection and adjuvant radiotherapy. Clear guidelines to treat this kind of lesions are not well established and there is not a consensus of correct treatment in these tumors.

Keywords

EVN - extraventricular neurocytoma - central neurocytoma


Publication History

Article published online:
20 April 2021

© 2021. Neurological Surgeons’ Society of India. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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