Is it true that breast cancer is the only type of cancer that is hereditary?

No: Breast cancer, ovarian cancer , familial colon adenomatosis polyposis , hereditary nonpolyposis colorectal cancer , multiple endocrine neoplasia ii, multiple endocrine neoplasia i, von hippel-lindau, ; li-fraumeni syndrome can be genetically linked.

No: Many cancers have a hereditary element to them. The misconception about breast cancer being the only one might be because it has a clinically meaningful genetic test to identify those at risk for it's hereditary version - the test for the brca gene. I am not aware of any other cancer with a similar test, and even if it did have one, breast cancer would be the more common one between the 2.