[Prevalence of central nervous system tumours and histological identification in the operated patient: 20 years of experience].
BACKGROUND
Central nervous system tumours comprise a heterogeneous group of neoplasms with great histological diversity. Despite the rising prevalence of these tumours in developing countries, some places like Mexico and Latin America have no representative studies that show the real impact of these tumours in our population.


OBJECTIVE
To describe the characteristics of the primary and secondary tumours of the central nervous system in the last 20 years in a Mexican institution.


METHODS
Patients with histopathological diagnosis from 1993 to 2013 in our institution, grouping them according to WHO classification 2007, characterising them by age group, gender, and anatomical location.


RESULTS
There were a total of 511 tumours of the central nervous system. Of those, 292 were women and 219 men, with a ratio 1.3: 1, and a mean age of 49.3 years. Tumours with higher prevalence were: Meningeal tumours, 171 (33%), followed by neuroepithelial, 121 (24%). Astrocytoma had the highest prevalence in paediatric patients, whereas in those older than 20 years it was the meningioma. The supratentorial location was the most involved.


CONCLUSIONS
This is the first study of a series of cases in Mexico that is performed by taking into account benign and malignant tumours of the central nervous system, with patients of all age groups with a range of 20 years. While this work only represents a retrospective analysis of an institution, it can be a strong indication of the epidemiology of these tumours in our environment.
Laboratorio de Patología Vascular Cerebral, Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, Ciudad de México, México.
Gustavo
G
Anaya-Delgadillo
Servicio de Neurocirugía, Hospital Español, Ciudad de México, México.
Pedro Pablo
PP
de Juambelz-Cisneros
Servicio de Neurocirugía, Hospital Español, Ciudad de México, México.
Basilio
B
Fernández-Alvarado
Servicio de Neurocirugía, Hospital Español, Ciudad de México, México.
Fernando
F
Pazos-Gómez
Servicio de Neurocirugía, Hospital Español, Ciudad de México, México.
Andrea
A
Velasco-Torre
Servicio de Neurocirugía, Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, Ciudad de México, México. Electronic address: rogelio_revuelta@gmail.com.
Rogelio
R
Revuelta-Gutiérrez
D017677:Age Distribution; D016543:Central Nervous System Neoplasms / Q000453:epidemiology* / Q000473:pathology / Q000556:secondary / Q000601:surgery; D017558:Elective Surgical Procedures; D005260:Female; D006786:Hospitals, Urban / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D008800:Mexico / Q000453:epidemiology; D019635:Neurosurgical Procedures; D009928:Organ Specificity; D015995:Prevalence; D012189:Retrospective Studies; D017678:Sex Distribution
Astrocitoma; Astrocytoma; Central nervous system tumours; Infratentorial; Meningioma; Pathology; Patología; Prevalence; Prevalencia; Supratentorial; Tumores de sistema nervioso central