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Incidence and survival trends for medulloblastomas in the United States from 2001 to 2013

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Population-based data examining recent epidemiological trends in medulloblastoma, the most common pediatric brain malignancy, are limited. Therefore, we sought to examine recent population-level trends in medulloblastoma incidence and survival. Central… Click to show full abstract

Population-based data examining recent epidemiological trends in medulloblastoma, the most common pediatric brain malignancy, are limited. Therefore, we sought to examine recent population-level trends in medulloblastoma incidence and survival. Central Brain Tumor Registry of the United States (CBTRUS) data were analyzed from 2001 to 2013. Age-adjusted incidence rates (IR) and annual percent changes (APCs) with 95% confidence intervals (CI) were calculated by age, sex, and race. Relative survival rates were calculated by age, sex, and race using Surveillance, Epidemiology and End-Results (SEER) registries; subsets of CBTRUS data. Kaplan–Meier and Cox proportional hazards models were used to examine survival differences. Medulloblastoma incidence remained relatively stable from 2001 to 2013, with minor fluctuations from 2001 to 2009 (APC = 2.2, 95% CI 0.8, 3.5) and 2009–2013 (APC = −4.1, 95% CI −7.5, −0.6). Incidence was highest in patients aged 1–4 years at diagnosis, but patients aged 10–14 years showed increased incidence from 2000 to 2013 (APC = 3.2, 95% CI 0.6, 5.8). Males displayed higher IR relative to females (males: 0.16 vs. females: 0.12), except in patients <1 year-old. Compared to Whites, Blacks displayed a non-significant increase in incidence (APC = 1.7, 95% CI −0.4, 4.0) and in mortality risk (hazard ratio for survival = 0.74; p = 0.09). The current study reports no overall change in medulloblastoma incidence from 2001 to 2013. Male and female patients <1 year-old had equal medulloblastoma incidence rates and poor 5-year relative survival compared to other ages. Non-significant trends in the data suggest disparities in medulloblastoma incidence and survival by race. Thus, analysis of tumor-specific trends by demographic variables can uncover clinically informative trends in cancer burden.

Keywords: incidence; incidence survival; medulloblastoma incidence; united states; 2001 2013; survival

Journal Title: Journal of Neuro-Oncology
Year Published: 2017

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