{"id":661,"date":"2014-07-23T03:57:51","date_gmt":"2014-07-23T03:57:51","guid":{"rendered":"http:\/\/stg-blogs.bmj.com\/jmg\/?p=661"},"modified":"2014-07-23T03:57:51","modified_gmt":"2014-07-23T03:57:51","slug":"long-term-prospective-clinical-follow-up-after-brca12-presymptomatic-testing-brca2-risks-higher-than-in-adjusted-retrospective-studies","status":"publish","type":"post","link":"https:\/\/stg-blogs.bmj.com\/jmg\/2014\/07\/23\/long-term-prospective-clinical-follow-up-after-brca12-presymptomatic-testing-brca2-risks-higher-than-in-adjusted-retrospective-studies\/","title":{"rendered":"Long-term prospective clinical follow-up after BRCA1\/2 presymptomatic testing: BRCA2 risks higher than in adjusted retrospective studies"},"content":{"rendered":"<p>The risks of breast cancer associated with gene faults in <em>BRCA1<\/em> and<em> BRCA2<\/em> have been reported to vary from as little as 30% (especially BRCA2) to as high as 90% by age 70 years. However, most studies that assessed risk look backwards at what has happened in families rather than forwards. These studies make adjustments for biases, but include women born before 1930 when breast cancer incidence rates were much lower. We assessed breast cancer risk prospectively in 254 unaffected women with <em>BRCA1<\/em> and 238 with <em>BRCA2<\/em> mutations.Nineteen breast cancers occurred in <em>BRCA1 <\/em>and 23 in <em>BRCA2<\/em>. Estimates of risk to 70 years of were 55.1% for <em>BRCA1<\/em> and 71.5% for<em> BRCA2<\/em>. Breast cancers were associated with stronger family histories especially for <em>BRCA2<\/em>. (By Prof. D Gareth Evans, <a href=\"http:\/\/jmg.bmj.com\/content\/early\/2014\/07\/22\/jmedgenet-2014-102336\">http:\/\/jmg.bmj.com\/content\/early\/2014\/07\/22\/jmedgenet-2014-102336<\/a> )<a href=\"https:\/\/stg-blogs.bmj.com\/jmg\/files\/2014\/07\/evanstonightPic.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-662\" src=\"https:\/\/stg-blogs.bmj.com\/jmg\/files\/2014\/07\/evanstonightPic-300x225.jpg\" alt=\"evanstonightPic\" width=\"300\" height=\"225\" srcset=\"https:\/\/stg-blogs.bmj.com\/jmg\/files\/2014\/07\/evanstonightPic-300x225.jpg 300w, https:\/\/stg-blogs.bmj.com\/jmg\/files\/2014\/07\/evanstonightPic.jpg 640w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><!--TrendMD v2.4.8--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The risks of breast cancer associated with gene faults in BRCA1 and BRCA2 have been reported to vary from as little as 30% (especially BRCA2) to as high as 90% by age 70 years. However, most studies that assessed risk look backwards at what has happened in families rather than forwards. These studies make adjustments [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/stg-blogs.bmj.com\/jmg\/2014\/07\/23\/long-term-prospective-clinical-follow-up-after-brca12-presymptomatic-testing-brca2-risks-higher-than-in-adjusted-retrospective-studies\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-661","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/posts\/661","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/comments?post=661"}],"version-history":[{"count":0,"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/posts\/661\/revisions"}],"wp:attachment":[{"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/media?parent=661"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/categories?post=661"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stg-blogs.bmj.com\/jmg\/wp-json\/wp\/v2\/tags?post=661"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}