How do you get genetic testing for cancer? every family member older then me ie parents aunts and uncles have all died with cancer and now younger bro

Its more complicated: Currently,more than 1% of all human genes are implicated via mutation in cancer.Many people think that the risk of Ca is always passed on through families as a single "cancer gene".However,like other complex diseases, changes in many genes that each play a role in the development of cancer are much more likely to be the cause of familial cancer than a change in a single gene.So,see a geneticist