Spyridon Marinopoulos,Eleni Papamattheou,Sofia-Dionysia Touriki,Aris Giannos,Constantine Dimitrakakis, Lynch Syndrome and Breast Cancer: Case Reports and Literature Review Surgical Case Reports 2020 2613-5965 http://dx.doi.org/10.31487/j.SCR.2020.09.15 https://www.sciencerepository.org/lynch-syndrome-and-breast-cancer-case-reports-and-literature-review_SCR-2020-9-115 Abstract: In the era of advanced cancer genomics, our knowledge of hereditary cancer mutations continues to expand. Lynch syndrome is one of the hereditary cancer predisposition syndromes associated with an increased lifelong risk of several types of cancer development, such as colorectal, endometrial, ovarian and other. This unique syndrome is an autosomal dominant inherited disease caused by mutations on EPCAM gene or on mismatch repair genes, which lead to microsatellite instability. In this article we will present three such cases visiting our clinic. They had breast cancer and a familial or personal history of malignancy. This article summarizes what we consider important about Lynch syndrome and breast cancer.Keywords: Breast cancer, Lynch syndrome, genetic testing