The histology of brain tumors for 67 331 children and 671 085 adults diagnosed in 60 countries during 2000-2014: a global, population-based study (CONCORD-3)
Fabio Girardi, Brian Rous, Charles Stiller, Gemma Gatta, Naomi Fersht, Hans H. Storm, Jéssica Rodrigues, C. Herrmann, Rafael Marcos‐Gragera, Rafael Peris‐Bonet, М. Yu. Valkov, Hannah K Weir, Ryan Woods, Hui You, Patricia Cueva, Prithwish De, V Di Carlo, Tom Børge Johannesen, Carlos Anselmo Lima, Charles F. Lynch, Michel P. Coleman, Claudia Allemani, CONCORD Working Group, S. Bouzbid, M Hamdi-Chérif, Zoubida Zaidi, Kaouel Meguenni, D. Regagba, Saray Mormeneo Bayo, T Cheick Bougadari, S S Manraj, Karima Bendahhou, A Ladipo, Olufemi J. Ogunbiyi, Thendo Ramaliba, Nontuthuzelo Somdyala, M A Chaplin, Florencia Moreno, G.H. Calabrano, S.B. Espinola, B Carballo Quintero, R Fita, W.D. Laspada, S.G. Ibañez, Carlos Anselmo Lima, A Mafra da Costa, P.C.F. De Souza, K Del Pino, C. Laporte, María Paula Curado, José Carlos de Oliveira, C.L.A. Veneziano, Donaldo Botelho Veneziano, M R D O Latorre, Luana Fiengo Tanaka, Marise Souto Rebelo, M O Santos, Gulnar Azevedo e Silva, J.C. Galaz, M Aparicio Aravena, J Sanhueza Monsalve, D.A. Herrmann, S Torres Vargas, Víctor Herrera, Claudia Uribe, Luis Eduardo Bravo, Luz Stella García, Nelson Enrique Arias-Ortiz, D Morantes, Daniel Jurado, María Clara Yépez Chamorro, Sandra Delgado, Melissa Ramirez, Y H Galán Alvarez, Priscila Torres, F Martínez-Reyes, L. Jaramillo, R. Quinto, J Castillo, M Mendoza, Patricia Cueva, J.G. Yépez, Bernard Bhakkan, Jacqueline Deloumeaux, Clarisse Joachim, Jonathan Macni, R Carrillo, J Shalkow Klincovstein, Rebeca Rivera-Gómez, P Pérez, Ebert Poquioma, Guillermo Tortolero‐Luna, Diego Zavala, R. Alonso, Enrique Barrios, Angela Eckstrand, C Nikiforuk, Ryan Woods, Glen Noonan, Donna Turner
Abstract
BACKGROUND: Global variations in survival for brain tumors are very wide when all histological types are considered together. Appraisal of international differences should be informed by the distribution of histology, but little is known beyond Europe and North America. METHODS: The source for the analysis was the CONCORD database, a program of global surveillance of cancer survival trends, which includes the tumor records of individual patients from more than 300 population-based cancer registries. We considered all patients aged 0-99 years who were diagnosed with a primary brain tumor during 2000-2014, whether malignant or nonmalignant. We presented the histology distribution of these tumors, for patients diagnosed during 2000-2004, 2005-2009, and 2010-2014. RESULTS: Records were submitted from 60 countries on 5 continents, 67 331 for children and 671 085 for adults. After exclusion of irrelevant morphology codes, the final study population comprised 60 783 children and 602 112 adults. Only 59 of 60 countries covered in CONCORD-3 were included because none of the Mexican records were eligible. We defined 12 histology groups for children, and 11 for adults. In children (0-14 years), the proportion of low-grade astrocytomas ranged between 6% and 50%. Medulloblastoma was the most common subtype in countries where low-grade astrocytoma was less commonly reported. In adults (15-99 years), the proportion of glioblastomas varied between 9% and 69%. International comparisons were made difficult by wide differences in the proportion of tumors with unspecified histology, which accounted for up to 52% of diagnoses in children and up to 65% in adults. CONCLUSIONS: To our knowledge, this is the first account of the global histology distribution of brain tumors, in children and adults. Our findings provide insights into the practices and the quality of cancer registration worldwide.