title: Three cases of kindred with familial breast cancer in which carrier detection by BRCA gene testing was performed on family members.
abstract: We performed presymptomatic carrier detection by BRCA gene testing of the family members of three familial breast cancer kindred diagnosed with pathogenetic mutation in BRCA genes. All members were over 20 years of age. We explained familial breast cancer and BRCA gene testing, and obtained autonomic consent before gene testing. Genetic testing revealed twins in a family were dizygotic. In another family bilateral breast cancer occurred in a carrier after five years of genetic testing. Carriers are at high risk of breast cancer and have to receive breast cancer screening and familial tumor counseling. Non-carriers are at the same risk of breast cancer as the general population.
authors.affiliation: Department of Surgery, Breast Cancer Center, Familial Tumor Clinic, Hoshi General Hospital, 2-1-16 Omachi, Koriyama, 963-8501, Japan. tfa-nomizu@hoshipital.or.jp
authors.forename: Tadashi
authors.initials: T
authors.lastname: Nomizu
authors.forename: Takeshi
authors.initials: T
authors.lastname: Sakuma
authors.forename: Mutsuo
authors.initials: M
authors.lastname: Yamada
authors.forename: Masami
authors.initials: M
authors.lastname: Matsuzaki
authors.forename: Naoto
authors.initials: N
authors.lastname: Katagata
authors.forename: Fumiaki
authors.initials: F
authors.lastname: Watanabe
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Nihei
authors.forename: Chikashi
authors.initials: C
authors.lastname: Ishioka
authors.forename: Seiichi
authors.initials: S
authors.lastname: Takenoshita
authors.forename: Rikiya
authors.initials: R
authors.lastname: Abe
mesh_terms: D000368:Aged; D024682:BRCA2 Protein / Q000235:genetics*; D001943:Breast Neoplasms / Q000235:genetics*; D005260:Female; D006580:Genetic Carrier Screening; D006579:Heterozygote; D006801:Humans; D008297:Male; D008875:Middle Aged; D010375:Pedigree
chemical_list: D024682:BRCA2 Protein; C551750:BRCA2 protein, human