Abstract
Background and aims
Women are at risk of colorectal cancer (CRC) during pregnancy but this fact is underappreciated. We performed a population-based study to evaluate the rate, predictors, and familial risk for pregnancy associated CRC in Utah.
Methods
All newly diagnosed cases of CRC between 1973 and 2014 were obtained from the Utah Cancer Registry and linked to pedigrees from the Utah Population Database.
Results
Of the 12,886 females diagnosed with CRC, 73 were diagnosed with CRC (0.57%) during the period of obstetric delivery/childbirth. Pregnancy associated CRC was diagnosed at a mean age of 31.9 years, and cancers were less frequently located in the proximal colon compared with women with non-pregnancy associated CRC. First-degree relatives of cases with pregnancy associated CRC had a nearly threefold higher risk of CRC (OR, 2.76; 95% CI, 1.26–6.01) compared with relatives of CRC-free individuals.
Conclusions
Of women diagnosed with CRC, less than 1% were diagnosed during or soon after obstetric delivery/childbirth. Relatives of these patients have a nearly threefold greater risk of CRC than those without a family history of CRC. These results provide physicians with data to guide the care of patients and their relatives with pregnancy associated CRC.
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Funding
The study was funded by the National Cancer Institute, American College of Gastroenterology, American Society for Gastrointestinal Endoscopy, and the Huntsman Cancer Foundation. The funding source did not play a role in the design, conduct, or reporting of the study or in the decision to submit the manuscript for publication.
Support for this project was provided by NCI grants P01-CA073992 (RWB), R01-CA040641 (RWB), an Endoscopic Research Award from the American Society for Gastrointestinal Endoscopy (NJS) and a Junior Faculty Career Development Award from the American College of Gastroenterology (NJS). Partial support for the Utah Population Database and this project was provided by the Huntsman Cancer Institute Cancer Center Support Grant P30CA042014 from the National Cancer institute and the Huntsman Cancer Foundation. Support for the Utah Cancer Registry is provided by Contract #HHSN 261201000026C from the National Cancer Institute with additional support from the Utah Department of Health and the University of Utah.
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Drs. Samadder and Curtin had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analyses. Study concept and design (RWB, KC, NJS); acquisition, analysis, and interpretation of data (KC, JW, KS); drafting of the manuscript (KC and NJS); critical revision of the manuscript for important intellectual content (KC, RWB, KS); statistical analysis (JW, KC); obtained funding (NJS and RWB).
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RWB is a consultant for Myriad Genetics and NJS is a consultant for Cancer Prevention Pharmaceuticals and Janssen Research and Development. No other authors have a conflict of interest to disclose.
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Samadder, N.J., Smith, K.R., Wong, J. et al. Colorectal cancer in the setting of pregnancy and familial risk. Int J Colorectal Dis 35, 1559–1566 (2020). https://doi.org/10.1007/s00384-020-03579-x
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DOI: https://doi.org/10.1007/s00384-020-03579-x