"An observation that has major implications for clinical practice was that nearly one-third of the women with inherited mutations had no prior personal history of breast cancer and no family history of ovarian or breast cancer," Swisher noted. This high proportion of unrecognized risk, she explained, is probably due to the combined effects of small family size, female cancer genes inherited from unaffected fathers, and the simple odds of a mutated gene being inherited or not inherited.
The researcher also found that the age when these types of cancer appear was not generally associated with the likelihood of having an inherited mutation, or with the gene in which a mutation was found.
There were no significant differences in survival rates between women who had one or more of the mutations identified in this study, and women who did not have these particular mutations.
What we found overall, the researchers noted, was that more than one in five cases of ovarian carcinoma were associate with a mutation in tumor suppressor genes. In their normal form, these genes act in a way that keeps tumors from growing.
The findings of this study, the researcher concluded, point to the need to develop comprehensive testing for inherited carcinoma for all women with ovarian, peritoneal or fallopian tube cancer, regardless of their age or family history. The researchers are moving clinical science forward to a time when expensive single gene testing for thousands of dollars will be replaced by testing many genes simultaneously at low cost.
|Contact: Leila Gray|
University of Washington