[Characteristics of familial breast cancer].
We report the clinical characteristics of familial breast cancer families at our hospital in which the number of second-degree of breast cancer probands was more than 2. In our hospital, the incidence of onset at a young age was 21.9%, and bilateral breast cancer was 10.5%. These incident rates were significantly higher than sporadic breast cancer. The frequency of familial breast cancer in most Japanese hospitals was about 1.1%, but was 2.0% in our hospital. Familial breast cancer is a rare breast cancer, but the risk is high in breast cancer families. Therefore, it is necessary to follow up not only patients but the families.
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D000367:Age Factors; D001943:Breast Neoplasms / Q000453:epidemiology / Q000235:genetics*; D018567:Breast Neoplasms, Male / Q000453:epidemiology / Q000235:genetics; D005260:Female; D006801:Humans; D015994:Incidence; D007564:Japan / Q000453:epidemiology; D008297:Male; D012306:Risk