Are there any studies with breast cancer genes that go down the male line? I know that it is rare, but it does occur. Because that is a issue for 2 of my cousins and their daughters. Their moms married brothers, and they have traced the gene to the male not the female line, as none of the rest of my aunts and there were 5 have breast cancer in their gene pool. Both my female cousins had breast cancer, 1 a double Mastectomy because of the markers, the other just a lumpectomy and radiation. Several of their daughters are gene positive.
I don’t know but I have the dubious honor of being the only member of my family, from either side, to have breast cancer.
Yes. Men who carry one of the BRCA mutations have a slightly higher risk of breast cancer, too, as well as prostate and other types of cancer. There's a 50% chance that their children will inherit it.