Abstract
Purpose
With the exception of papillary and follicular thyroid cancer, malignant cancers of the thyroid, parathyroid, adrenal, and endocrine pancreas are uncommon. These rare malignancies present a challenge to both the clinician and patient, because few data exist on their incidence or survival. We analyzed the incidence and survival of these rare endocrine cancers (RECs), as well as the trends in incidence over time.
Methods
We used the NCI’s SEER 18 database (2000–2012) to investigate incidence and survival of rare cancers of the thyroid, parathyroid, adrenal, and endocrine pancreas. Cancers were categorized using the WHO classification systems. We collected data on incidence, gender, stage, size, and survival. Time trends were evaluated from 2000–2002 to 2010–2012.
Results
We identified 36 types of rare cancers in the endocrine organs captured in the SEER database. RECs of the thyroid had the highest combined incidence rate (IR 8.26), followed by pancreas (IR 3.24), adrenal (IR 2.71), and parathyroid (IR 0.41). The incidence rate for all rare endocrine organs combined increased 32.4 % during the study period. The majority of the increase was attributable to rare cancers of thyroid, which increased in not only microcarcinomas, but in all sizes. The mean 5-year survival for RECs is 59.56 % (range 2.49–100 %).
Conclusions
This study is a comprehensive analysis of the incidence and survival for rare malignant endocrine cancers. There has been an increase in incidence rate of almost all RECs and their survival is low. We hope that our data will serve as a source of information for clinicians as well as bring awareness regarding these uncommon cancers.
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Acknowledgments
This project was supported by the University of Chicago Bucksbaum Institute for Clinical Excellence. RHG was supported by Award Number K12CA139160 from the National Cancer Institute. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Cancer Institute or The National Institutes of Health.
Funding
Funding was provided by internal sources from the Department of Surgery at the University of Chicago.
Financial Disclosures
There are no relevant conflicts of interests by any of the authors.
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James, B.C., Aschebrook-Kilfoy, B., Cipriani, N. et al. The Incidence and Survival of Rare Cancers of the Thyroid, Parathyroid, Adrenal, and Pancreas. Ann Surg Oncol 23, 424–433 (2016). https://doi.org/10.1245/s10434-015-4901-9
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DOI: https://doi.org/10.1245/s10434-015-4901-9