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- W2590491750 abstract "112 Background: BC survivors are at higher risk of developing SNBM due to treatment effects and shared behavioral and genetic factors. Associations between histologic subtypes of primary BC and secondary endometrial or ovarian cancer have been reported. Less is known about subtype-specific associations with other secondary solid tumors. We aimed to determine the prevalence of SNBM across US Oncology practices and what subtype-specific associations, if any, exist between primary BC and SNBM. Methods: We conducted a retrospective database analysis identifying BC patients (pts) diagnosed between 01/2007 and 05/2013. SNBM were ascertained from codified fields in pts electronic records. Age at BC diagnosis, BC stage, estrogen receptor (ER), progesterone receptor (PR), HER2 status, BMI and smoking history were collected. Chi-square tests were used to compare categorical variables. Logistic regression was used to predict likelihood of secondary malignancies in separate multivariate models. Results: 105,795 pts with stage 0-IV BC were identified. 2,237 (2.1%) were diagnosed with ≥ 1 SNBM. Mean age at diagnosis and follow-up were 59.5 and 2.6 years respectively. Pts with SNBM were more likely to have: older age, ≥ stage I, HER-2 negative disease, BMI ≥25 and past/current smoking history. SNBM were most commonly: Non-small cell lung cancer (NSCLC) (n=346), colorectal (CRC) (n=250), uterine (n=192), ovarian (n=130), thyroid (n=106) and kidney cancer (n=73). No associations were found between BC subtypes and ovarian, uterine, thyroid or NSCLC. Significant positive and negative associations between triple-negative breast cancer (TNBC) and secondary CRC and kidney cancer, respectively, were noted. In multivariate analysis, TNBC was predictive of secondary kidney cancer (OR 2.00, p=0.019). TNBC (OR 0.47, p=0.009), age ≤55 (OR 0.27, p<0.0001) and BMI ≤30 (OR 0.64 for BMI 25-30, p=0.019) were negative predictors of secondary CRC. Conclusions: Our study is the first to report direct and inverse associations between primary TNBC and secondary kidney and CRC, respectively. The short follow-up precludes treatment-related effects. Results may potentially be attributed to genetic, environmental or lifestyle factors and warrant further research." @default.
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- W2590491750 date "2014-09-10" @default.
- W2590491750 modified "2023-10-17" @default.
- W2590491750 title "Secondary nonbreast malignancies (SNBM) after primary breast cancer (BC)." @default.
- W2590491750 doi "https://doi.org/10.1200/jco.2014.32.26_suppl.112" @default.
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