Are women with breast, endometrial, or ovarian cancer at increased risk for colorectal cancer?
Schoen RE; Weissfeld JL; Kuller LH Division of Gastroenterology, Pittsburgh Cancer Institute, Pennsylvania. OBJECTIVES: Evidence is accumulating supporting the use of screening for colorectal cancer. Patients at higher risk for colorectal cancer are more likely to benefit from screening. Women with breast, endometrial, or ovarian cancer are often classified as at high risk for subsequent colorectal cancer, and are urged to undergo screening, but the basis for this is uncertain. METHODS: We performed a meta-analysis of published data to assess the risk of colorectal cancer after these cancers. RESULTS: Based on 154,270 women and 779,251 person-yr of observation (PYO) after breast cancer, 37,266 women and 229,498 PYO after endometrial cancer, and 41,366 women and 126,688 PYO after ovarian cancer, the age-adjusted relative risk (95% CI) for colorectal cancer after breast cancer was 1.1 (1.07, 1.19), after endometrial cancer 1.4 (1.32, 1.55), and after ovarian cancer 1.6 (1.40, 1.80). CONC
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