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Cancer prevalence in 129 breast-ovarian cancer families tested for BRCA1 and BRCA2 mutations
Abstract
Objectives. To assess the cancer risk profile in RCA-mutationpositive
and negative South African breast-ovarian cancer families, mainly of Caucasian origin.
Design. Descriptive study in which the prevalence of all cancers in the pedigrees of BRCA1- and BRCA2-mutationpositive groups and a group of families without mutations in either gene were compared with the general population.
Results. As expected, female breast and ovarian cancer was significantly increased in all three groups. Furthermore, male breast cancer was significantly elevated in the BRCA2-positive and BRCA-negative groups. Stomach cancer prevalence was significantly elevated in the BRCA2-positive families compared with the general population.
Conclusions. These results can be applied in estimation of cancer risks and may contribute to more comprehensive counselling of mutation-positive Caucasian breast and/or ovarian cancer families.
