Incidence and survival trends in oligodendrogliomas and anaplastic oligodendrogliomas in the United States from 2000 to 2013: a CBTRUS Report
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Measuring tumor-specific trends in incidence is necessary to elucidate tumor-type contribution to overall cancer burden in the US population. Recently, there have been conflicting reports concerning the incidence of oligodendrogliomas (OD) and anaplastic oligodendrogliomas (AOD). Therefore, our goal was to examine trends in OD and AOD incidence and survival by age, gender and race. Data was analyzed from the Central Brain Tumor Registry of the United States (CBTRUS) from 2000 to 2013. Age-adjusted incidence rates per 100,000 person-years with 95% confidence intervals (CI) and annual percent changes (APCs) with 95% CI were calculated for OD and AOD by age, sex and race. Survival rates were calculated for age, sex and race using a subset of the CBTRUS data. OD and AOD incidence peaked at 36–40 and 56–60 years, respectively. AOD:OD ratio increased up to age 75. Overall, OD and AOD incidence decreased [OD: APC −3.2 (2000–2013), AOD: −6.5 (2000–2007)]. OD incidence was highest in Whites but decreased significantly (2000–2013: APC −3.1) while incidence in Black populations did not significantly decrease (2000–2013: APC −1.6). Survival rates decreased with advancing age for OD, while persons aged 0–24 had the lowest survival for AOD. The current study reports a decrease in overall OD and AOD incidence from 2000 to 2013. Furthermore, AOD makes up an increasing proportion of oligodendroglial tumors up to age 75. Lower AOD survival in 0–24 years old may indicate molecular differences in pediatric cases. Thus, surveillance of tumor-specific trends by age, race and sex can reveal clinically relevant variations.
KeywordsOligodendroglioma Cancer registries Incidence Survival Time trends
Funding for CBTRUS was provided by the Centers for Disease Control and Prevention (CDC) under Contract No. 200-2016-M-90304, The Sontag Foundation, Genentech, Novocure, Celldex, AbbVie, along with the Musella Foundation, Voices Against Cancer, Elekta, and the Zelda Dorin Tetenbaum Memorial Fund, as well as private and in kind donations.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This study was approved by the Institutional Review Board at University Hospitals Case Medical Center. For this type of study, formal consent was not required.
This was a retrospective study using de-identified national cancer registries. Thus, formal consent was not required.
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