title: Brief descriptive epidemiology of primary malignant brain tumors from North-East India.
abstract: Brain tumors are a mixed group of neoplasms that originate from the intracranial tissues and the meninges with degrees of malignancy varying greatly from benign to aggressive. Not much is known about the epidemiology of primary malignant brain tumors (PMBTs) in our population in North-East India. In this analysis, an attempt was made to identify the age groups, gender distribution, topography and different histological types of PMBT with data from a hospital cancer registry. A total of 231 cases of PMBT were identified and included for the present analysis. Our analysis has shown that most of PMBT occur at 20-60 years of age, with a male to female ratio of 2.3:1. Some 70.5% of cases occurred in cerebral lobes except for the occipital lobe, and astrocytic tumors were the most common broad histological type. In our population the prevalence of PMBT is 1% of all cancers, mostly affecting young and middle aged patients. As brain tumors are rare, so case-control analytic epidemiological studies will be required to establish the risk factors prevalent in our population.
authors.affiliation: Department of Cancer Epidemiology and Biostatistics, Dr.B Borooah Cancer Institute, Guwahati, India E-mail : mani_greeva@yahoo.co.in.
authors.forename: Manigreeva
authors.initials: M
authors.lastname: Krishnatreya
authors.forename: Amal Chandra
authors.initials: AC
authors.lastname: Kataki
authors.forename: Jagannath Dev
authors.initials: JD
authors.lastname: Sharma
authors.forename: Mouchumee
authors.initials: M
authors.lastname: Bhattacharyya
authors.forename: Pintu
authors.initials: P
authors.lastname: Nandy
authors.forename: Munlima
authors.initials: M
authors.lastname: Hazarika
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001932:Brain Neoplasms / Q000453:epidemiology* / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006761:Hospitals / Q000706:statistics & numerical data*; D006801:Humans; D007194:India / Q000453:epidemiology; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D015995:Prevalence; D011379:Prognosis; D012042:Registries / Q000706:statistics & numerical data*; D012307:Risk Factors; D055815:Young Adult