Many pregnancy-related factors are associated with reduced endometrial cancer risk. However, it remains unclear whether pregnancy-related complications (e.g., hypertensive conditions) are associated with risk and whether these associations vary by endometrial cancersubtype. Thus, we evaluated the risk of endometrial cancer, overall and by subtype, in relation to pregnancy-related factors, pregnancy complications, and birth characteristics. Utilizing population-based register data from four Nordic countries we conducted a nested case-control analysis of endometrial cancer risk. We included 10,924 endometrial cancer cases and up to 10 matched controls per case. Odds ratios (ORs) with 95% confidence intervals (CIs) were derived from unconditional logistic regression models. We further evaluated associations by individual histology (i.e., endometrioid, serous, etc.) or, for rare exposures (e.g., pregnancy complications), by dualistic Type (Type I (n=10,343) and Type II (n=581)). Pre-existing and pregnancy-related hypertensive conditions were associated with increased endometrial cancer risk [OR (95% CI): pre-existing hypertension 1.88 (1.39-2.55); gestational hypertension 1.47 (1.33-1.63); preeclampsia 1.43 (1.30-1.58)], with consistent associations across dualistic Type. Increasing number of pregnancies [≥four versus one birth: 0.64 (0.59-0.69)] and shorter time since last birth [<10 versus ≥30 years: 0.34 (0.29-0.40)] were associated with reduced endometrial cancer risk, with consistent associations across most subtypes. Our findings support the role for both hormonal exposures and cell clearance as well as immunologic/inflammatory etiologies for endometrial cancer. This research supports studying endometrialhyperplasia, a precursor condition of endometrial cancer, in the context of pregnancy-related exposures, as this may provide insight into the mechanisms by which pregnancy affects subsequent cancer risk.
Today's Top 5
5. New Clinical Trial Guidelines for Melanoma
4. Unmet Need in Metastatic Breast Cancer
The following is a significant unmet need in #MetastaticBreastCancer clinical care & #oncology #drugdevelopment:#MBC that relentlessly recurs in chest wall & nowhere else. Please find the target & drug it. Surgery & rad onc can only do their thing just so many times.#bcsm— Tatiana Prowell, MD (@tmprowell) August 14, 2019
3. Liquid Biopsies
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1. Juul and Young People
Introduced in 2015, JUULs work much as other e-cigarettes do, but because they’re small and sleek — resembling a USB flash drive — and come in a variety of flavors, critics have charged that they’ve been specifically targeted to young people. https://t.co/Big3av4qGo— Dana-Farber (@DanaFarber) August 16, 2019