Total submissions: 8
Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
---|---|---|---|---|---|---|---|---|
Evidence- |
RCV000238952 | SCV000783617 | pathogenic | Breast-ovarian cancer, familial, susceptibility to, 1 | 2017-12-15 | reviewed by expert panel | curation | Variant allele predicted to encode a truncated non-functional protein. |
Quest Diagnostics Nichols Institute San Juan Capistrano | RCV000238952 | SCV000296389 | pathogenic | Breast-ovarian cancer, familial, susceptibility to, 1 | 2015-09-25 | criteria provided, single submitter | clinical testing | |
Gene |
RCV000486921 | SCV000564725 | pathogenic | not provided | 2016-05-06 | criteria provided, single submitter | clinical testing | This duplication of two nucleotides is denoted BRCA1 c.2331_2332dupTG at the cDNA level and p.Gly778ValfsX15 (G778VfsX15) at the protein level. This variant is also known as BRCA1 2450_2451dupTG or 2451insTG using alternate nomenclature. The normal sequence, with the bases that are duplicated in braces, is ATTA[TG]GCAC. The duplication causes a frameshift, which changes a Glycine to a Valine at codon 778, and creates a premature stop codon at position 15 of the new reading frame. Although this variant has not, to our knowledge, been reported in the literature, it is predicted to cause loss of normal protein function through either protein truncation or nonsense-mediated mRNA decay. We consider this variant to be pathogenic. |
Ambry Genetics | RCV000575312 | SCV000665887 | pathogenic | Hereditary cancer-predisposing syndrome | 2016-11-28 | criteria provided, single submitter | clinical testing | The c.2331_2332dupTG pathogenic mutation, located in coding exon 9 of the BRCA1 gene, results from a duplication of TG at nucleotide position 2331, causing a translational frameshift with a predicted alternate stop codon. This alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation. |
Labcorp Genetics |
RCV002518502 | SCV003237310 | pathogenic | Hereditary breast ovarian cancer syndrome | 2022-09-18 | criteria provided, single submitter | clinical testing | This sequence change creates a premature translational stop signal (p.Gly778Valfs*15) in the BRCA1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in BRCA1 are known to be pathogenic (PMID: 20104584). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with BRCA1-related conditions. ClinVar contains an entry for this variant (Variation ID: 252382). For these reasons, this variant has been classified as Pathogenic. |
Baylor Genetics | RCV000238952 | SCV004216836 | likely pathogenic | Breast-ovarian cancer, familial, susceptibility to, 1 | 2023-02-14 | criteria provided, single submitter | clinical testing | |
Sharing Clinical Reports Project |
RCV000238952 | SCV000115101 | pathogenic | Breast-ovarian cancer, familial, susceptibility to, 1 | 2011-10-17 | no assertion criteria provided | clinical testing | |
Gene |
RCV000159905 | SCV000210021 | pathogenic | Familial cancer of breast | 2014-06-25 | flagged submission | clinical testing | This insertion of 2 nucleotides is denoted BRCA1 c.2332_2333insTG (a.k.a c.2331_2332dupTG) at the cDNA level and p.Gly778ValfsX15 (G778VfsX15) at the protein level. The normal sequence, with the bases that are inserted in brackets, is TATG{insTG}GCAC. The insertion causes a frameshift, which changes a Glycine to a Valine at codon 778 in exon 10, and creates a premature stop codon at position 15 of the new reading frame. This mutation is also known as BRCA1 2451insTG using alternate nomenclature. Although this mutation has not, to our knowledge, been reported in the literature, it is predicted to cause loss of normal protein function through either protein truncation or nonsense-mediated mRNA decay. We consider this mutation to be pathogenic. and is indicative of Hereditary Breast and Ovarian Cancer (HBOC), an autosomal dominant condition that predisposes to early onset breast cancer, ovarian and fallopian tube cancer, as well as other cancers. Breast and ovarian cancer are the predominant BRCA1-related cancers that unaffected female mutation carriers are at risk to develop. The lifetime risk for breast cancer is estimated to be 57 to 84% and the lifetime risk for ovarian cancer is estimated to be 24 to 54% (Antoniou 2003, Chen 2007, Ford 1998). BRCA1 mutations have also been reported in women with fallopian tube carcinoma, primary peritoneal carcinoma, and uterine serous carcinoma (Levine 2003, Pennington 2013). Graeser et al. (2009) found that women who harbor a pathogenic BRCA1 mutation have an increased risk for contralateral breast cancer that is dependent on age at initial diagnosis. It is estimated that the risk to develop a second breast cancer within 10 years of the first diagnosis if initially diagnosed less than age 40 years of age is 31%, between the ages of 40 and 50 is 11% and after the age of 50 is 8%. Additionally, it is estimated that the risk to develop a second breast cancer within 25 years of their first diagnosis if initially diagnosed less than age 40 years of age is 63%, between the ages of 40 and 50 is 44% and after the age of 50 is 20%. Other cancer risks associated with a BRCA1 pathogenic variant include approximately a 20% risk for prostate cancer in male carriers (Thompson 2002), a 4% risk for male breast cancer (Liede 2004), and an estimated 1 to 3% risk for pancreatic cancer in both men and women (Brose 2002, Thompson 2002). The variant is found in BRCA panel(s). |