Genome coordinates and reported ORs for the breast cancer risk SNPs used in this study. Table S2.... more Genome coordinates and reported ORs for the breast cancer risk SNPs used in this study. Table S2. Sequencing coverage of 56 candidate genes in case and control cohorts. Table S3. Rare (MAF,
Premature or primary ovarian insufficiency (POI) affects approximately 1% of women and can be due... more Premature or primary ovarian insufficiency (POI) affects approximately 1% of women and can be due to a variety of causes. Genetic causes include syndromic and non-syndromic POI. There are several promising candidate genes for whom a clear Mendelian association with non-syndromic POI has not yet been conclusively established, including GDF9. GDF9 is an oocyte-secreted factor and is part of the TGF-beta superfamily of morphogens. It has an important role in follicular development and granulosa cell maturation. We report the case of two siblings with primary ovarian insufficiency (POI) and a homozygous truncating variant in GDF9 (c.604C>T; p.(Gln202*). This report helps establish a clear gene-disease association between GDF9 and POI and argues for routine evaluation for GDF9 variants in patients undergoing genomic investigation for POI.
Breast cancer (BC) has a significant heritable component but the genetic contribution remains unr... more Breast cancer (BC) has a significant heritable component but the genetic contribution remains unresolved in the majority of high-risk BC families. This study aims to investigate the monogenic causes underlying the familial aggregation of BC beyond BRCA1 and BRCA2, including the identification of new predisposing genes. A total of 11,511 non-BRCA familial BC cases and population-matched cancer-free female controls in the BEACCON study were investigated in two sequencing phases: 1303 candidate genes in up to 3892 cases and controls, followed by validation of 145 shortlisted genes in an additional 7619 subjects. The coding regions and exon–intron boundaries of all candidate genes and 14 previously proposed BC genes were sequenced using custom designed sequencing panels. Pedigree and pathology data were analysed to identify genotype-specific associations. The contribution of ATM, PALB2 and CHEK2 to BC predisposition was confirmed, but not RAD50 and NBN. An overall excess of loss-of-func...
Introduction People of Ashkenazi Jewish (AJ) ancestry are more likely than unselected populations... more Introduction People of Ashkenazi Jewish (AJ) ancestry are more likely than unselected populations to have a BRCA1/2 pathogenic variant, which cause a significantly increased risk of breast, ovarian and prostate cancer. Three specific BRCA1/2 pathogenic variants, referred to as BRCA-Jewish founder mutations (B-JFM), account for >90% of BRCA1/2 pathogenic variants in people of AJ ancestry. Current practice of identifying eligible individuals for BRCA testing based on personal and/or family history has been shown to miss at least 50% of people who have one of these variants. Here we describe the protocol of the JeneScreen study—a study established to develop and evaluate two different population-based B-JFM screening programmes, offered to people of Jewish ancestry in Sydney and Melbourne, Australia. Methods and analysis To rmeasure the acceptability of population-based B-JFM screening in Australia, two screening programmes using different methodologies have been developed. The Sydn...
Personal Breast Cancer (BC) Risk Assessments (PBCRA) have potential to stratify women into clinic... more Personal Breast Cancer (BC) Risk Assessments (PBCRA) have potential to stratify women into clinically-actionable BC risk categories. As this could involve population-wide genomic testing, women’s attitudes to PBCRA and views on acceptable implementation platforms must be considered to ensure optimal population participation. We explored these issues with 31 women with different BC risk profiles through semi-structured focus group discussions or interviews. Inductive thematic coding of transcripts was performed. Subsequently, women listed factors that would impact on their decision to participate. Participants’ attitudes to PBCRA were positive. Identified themes included that PBCRA acceptance hinges on result actionability. Women value the ability to inform decision-making. Participants reported anxiety, stress, and genetic discrimination as potential barriers. The age at which PBCRA was offered, ease of access, and how results are returned held importance. Most women value the oppor...
Background Despite a modest association between tobacco smoking and breast cancer risk reported b... more Background Despite a modest association between tobacco smoking and breast cancer risk reported by recent epidemiological studies, it is still equivocal whether smoking is causally related to breast cancer risk. Methods We applied Mendelian randomisation (MR) to evaluate a potential causal effect of cigarette smoking on breast cancer risk. Both individual-level data as well as summary statistics for 164 single-nucleotide polymorphisms (SNPs) reported in genome-wide association studies of lifetime smoking index (LSI) or cigarette per day (CPD) were used to obtain MR effect estimates. Data from 108,420 invasive breast cancer cases and 87,681 controls were used for the LSI analysis and for the CPD analysis conducted among ever-smokers from 26,147 cancer cases and 26,072 controls. Sensitivity analyses were conducted to address pleiotropy. Results Genetically predicted LSI was associated with increased breast cancer risk (OR 1.18 per SD, 95% CI: 1.07–1.30, P = 0.11 × 10–2), but there was...
Background The aetiology of male breast cancer (MBC) is poorly understood. In particular, the ext... more Background The aetiology of male breast cancer (MBC) is poorly understood. In particular, the extent to which the genetic basis of MBC differs from female breast cancer (FBC) is unknown. A previous genome-wide association study (GWAS) of MBC identified two predisposition loci for the disease, both of which were also associated with risk of FBC. Methods We performed genome-wide single nucleotide polymorphism (SNP) genotyping of European ancestry MBC case subjects and controls, in three stages. Associations between directly genotyped and imputed SNPs with MBC were assessed using fixed-effects meta-analysis of 1,380 cases and 3,620 controls. Replication genotyping of 810 cases and 1,026 controls was used to validate variants with P-values < 1 x 10-06. Genetic correlation with FBC was evaluated using LD score regression, by comprehensively examining the associations of published FBC risk loci with risk of MBC and by assessing associations between a FBC polygenic risk score (PRS) and ...
Background Dilated cardiomyopathy may be heritable but shows extensive genetic heterogeneity. The... more Background Dilated cardiomyopathy may be heritable but shows extensive genetic heterogeneity. The utility of whole exome sequencing as a first‐line genetic test for patients with dilated cardiomyopathy in a contemporary “real‐world” setting has not been specifically established. Using whole exome sequencing with rigorous, evidence‐based variant interpretation, we aimed to identify the prevalence of a molecular diagnosis in patients with dilated cardiomyopathy in a clinical setting. Methods and Results Whole exome sequencing was performed in eligible patients (n=83) with idiopathic or familial dilated cardiomyopathy. Variants were prioritized for curation in up to 247 genes and classified using American College of Medical Genetics and Genomics–based criteria. Ten (12%) had a pathogenic or likely pathogenic variant. Eight (10%) participants had truncating TTN variants classified as variants of uncertain significance. Five (6%) participants had variants of unknown significance accordin...
OBJECTIVE Only risk-reducing bilateral salpingo-oophorectomy (RRBSO) has been shown to reduce ova... more OBJECTIVE Only risk-reducing bilateral salpingo-oophorectomy (RRBSO) has been shown to reduce ovarian cancer deaths in high-risk women. Uptake of RRBSO is, however, suboptimal and reasons are not well defined. More information is needed about the barriers to RRBSO and patient needs for information and care. METHODS Cross-sectional study including the Perception of Cancer Risk Scale, factors affecting decision-making about RRBSO, and unmet information needs were measured using a purpose-designed questionnaire. RESULTS Of the 193 high-risk women aged 30 to 50 approached, 60 (31%) agreed to participate. Respondents were either considering or had recently undergone premenopausal RRBSO. Most (49/60) had no personal history of cancer; 11/60 had previous breast cancer. Overall, responses did not differ between pre- and post-RRBSO participants. The main barriers to RRBSO were surgical menopause and loss of fertility. Other concerns included the impact on sexual function and bone health. Reduction in ovarian cancer risk and prolonged life expectancy were the main drivers for RRBSO. Participants understood that RRBSO reduced cancer risk, although most substantially overestimated their personal ovarian cancer risk. High-risk women wanted more information about how to manage the short- and long-term consequences of surgical menopause. CONCLUSIONS Concerns about surgical menopause and loss of fertility are barriers to RRBSO for high-risk women despite understanding the benefits of reduced cancer risk. There is an unmet need for more information about effectively managing the noncancer consequences of RRBSO in premenopausal women. : Video Summary:http://links.lww.com/MENO/A478.
Background and Aims The detection of sequence variants and copy number changes can improve diagno... more Background and Aims The detection of sequence variants and copy number changes can improve diagnosis, inform prognosis and guide treatment in patients with bone marrow failure syndromes (BMFS). We aimed to establish and prospectively assess the impact of comprehensive genomic evaluation on diagnostic categorisation and clinical outcomes in patients with genomically uncharacterised BMFS. Methods Eligible patients were recruited from four participating institutions across Victoria, Australia. Inclusion criteria were (i) age >3 months (ii) clinicopathological diagnosis or suspicion of either acquired aplastic anaemia (AA), inherited BMFS, hypoplastic myelodysplastic syndrome (hMDS) or a BMFS with marrow hypoplasia/aplasia not able to be definitively categorised. Patients initially underwent 90-gene targeted sequencing (Peter MacCallum Cancer Centre PanHaem and Myeloid Amplicon next generation sequencing [NGS] panels) for rapid turnaround of accredited results for clinical decision-m...
OBJECTIVE The aim of this study was to identify the unmet information needs of healthcare profess... more OBJECTIVE The aim of this study was to identify the unmet information needs of healthcare professionals managing risk-reducing bilateral salpingo-oophorectomy (RRBSO) in premenopausal women. METHODS A cross-sectional survey of healthcare professionals managing high-risk women in Victoria, Australia. Questions included roles and responsibilities around RRBSO, perceived barriers to uptake of RRBSO, and unmet information needs. RESULTS One hundred eighteen healthcare professionals across 10 different disciplines and specialties were approached to participate, of whom 47 completed the survey. Most respondents were genetic counselors (47%) or nurses (19%) and all worked in the public health system. Almost all (81%) provided information about RRBSO, but there was considerable uncertainty about who was responsible for making decisions with high-risk women about RRBSO. Most (85%) were "quite a bit" or "extremely" confident about informing high-risk women about ovarian cancer risk reduction from RRBSO and the surgical procedure (47%), but only one-third were "quite a bit" or "extremely" confident about discussing (36%) or managing (31%) surgical menopause. Furthermore, surgical menopause was considered the main barrier (88%, "quite a bit" or "extremely") to RRBSO. Most healthcare professionals (78%) wanted more information and resources about surgical menopause for high-risk women. CONCLUSIONS There is uncertainty around the roles and responsibilities of healthcare professionals managing high-risk women around RRBSO. Surgical menopause is perceived as a major barrier to RRBSO and healthcare professionals lack confidence in managing this outcome. : Video Summary:http://links.lww.com/MENO/A477.
The Journal of Clinical Endocrinology & Metabolism
Purpose Germline succinate dehydrogenase (SDHx) mutation carriers, especially SDHB, are at increa... more Purpose Germline succinate dehydrogenase (SDHx) mutation carriers, especially SDHB, are at increased risk for malignancy and require life-long surveillance. Current guidelines recommend periodic whole-body MRI imaging. We assessed the incremental value of 68Ga-DOTA-octreotate (GaTate) positron emission tomography (PET)/CT compared with conventional imaging in such patients. Methods SDHx mutation carriers who had GaTate PET/CT were retrospectively reviewed. Detection of lesions were compared with MRI or CT on a per-patient and per-lesion basis. Proof of lesions were based on histopathology or clinical/imaging follow-up. Results Twenty consecutive patients (median age, 46 years; 10 males) were reviewed. Fourteen patients had SDHB, four, SDHD, one SDHC, and one SDHA mutation. Fifteen had prior surgery and/or radiotherapy. Indications for PET/CT were as follows: 7 patients for surveillance for previously treated disease, 9 residual disease, 2 asymptomatic mutation carriers, and 2 for el...
Federal funding for germline genetic testing in hereditary breast and ovarian cancer (HBOC) was r... more Federal funding for germline genetic testing in hereditary breast and ovarian cancer (HBOC) was recently introduced. Germline testing for HBOC under Medicare Benefits Schedule items 73296/73297 can be requested by any specialist, whereas the previous state- and territory-funded testing was limited to those operating within a familial cancer service. The impact of this decentralisation of HBOC testing on health and economic outcomes is uncertain, primarily as it has potential to significantly disrupt the clinical framework that generated the evidence used to justify clinical implementation of the Medicare Benefits Schedules.
BackgroundUntil recently, determining penetrance required large observational cohort studies. Dat... more BackgroundUntil recently, determining penetrance required large observational cohort studies. Data from the Exome Aggregate Consortium (ExAC) allows a Bayesian approach to calculate penetrance, in that population frequencies of pathogenic germline variants should be inversely proportional to their penetrance for disease. We tested this hypothesis using data from two cohorts for succinate dehydrogenase subunits A, B and C (SDHA–C) genetic variants associated with hereditary pheochromocytoma/paraganglioma (PC/PGL).MethodsTwo cohorts were 575 unrelated Australian subjects and 1240 unrelated UK subjects, respectively, with PC/PGL in whom genetic testing had been performed. Penetrance of pathogenic SDHA–C variants was calculated by comparing allelic frequencies in cases versus controls from ExAC (removing those variants contributed by The Cancer Genome Atlas).ResultsPathogenic SDHA–C variants were identified in 106 subjects (18.4%) in cohort 1 and 317 subjects (25.6%) in cohort 2. Of 94 ...
Genome coordinates and reported ORs for the breast cancer risk SNPs used in this study. Table S2.... more Genome coordinates and reported ORs for the breast cancer risk SNPs used in this study. Table S2. Sequencing coverage of 56 candidate genes in case and control cohorts. Table S3. Rare (MAF,
Premature or primary ovarian insufficiency (POI) affects approximately 1% of women and can be due... more Premature or primary ovarian insufficiency (POI) affects approximately 1% of women and can be due to a variety of causes. Genetic causes include syndromic and non-syndromic POI. There are several promising candidate genes for whom a clear Mendelian association with non-syndromic POI has not yet been conclusively established, including GDF9. GDF9 is an oocyte-secreted factor and is part of the TGF-beta superfamily of morphogens. It has an important role in follicular development and granulosa cell maturation. We report the case of two siblings with primary ovarian insufficiency (POI) and a homozygous truncating variant in GDF9 (c.604C>T; p.(Gln202*). This report helps establish a clear gene-disease association between GDF9 and POI and argues for routine evaluation for GDF9 variants in patients undergoing genomic investigation for POI.
Breast cancer (BC) has a significant heritable component but the genetic contribution remains unr... more Breast cancer (BC) has a significant heritable component but the genetic contribution remains unresolved in the majority of high-risk BC families. This study aims to investigate the monogenic causes underlying the familial aggregation of BC beyond BRCA1 and BRCA2, including the identification of new predisposing genes. A total of 11,511 non-BRCA familial BC cases and population-matched cancer-free female controls in the BEACCON study were investigated in two sequencing phases: 1303 candidate genes in up to 3892 cases and controls, followed by validation of 145 shortlisted genes in an additional 7619 subjects. The coding regions and exon–intron boundaries of all candidate genes and 14 previously proposed BC genes were sequenced using custom designed sequencing panels. Pedigree and pathology data were analysed to identify genotype-specific associations. The contribution of ATM, PALB2 and CHEK2 to BC predisposition was confirmed, but not RAD50 and NBN. An overall excess of loss-of-func...
Introduction People of Ashkenazi Jewish (AJ) ancestry are more likely than unselected populations... more Introduction People of Ashkenazi Jewish (AJ) ancestry are more likely than unselected populations to have a BRCA1/2 pathogenic variant, which cause a significantly increased risk of breast, ovarian and prostate cancer. Three specific BRCA1/2 pathogenic variants, referred to as BRCA-Jewish founder mutations (B-JFM), account for >90% of BRCA1/2 pathogenic variants in people of AJ ancestry. Current practice of identifying eligible individuals for BRCA testing based on personal and/or family history has been shown to miss at least 50% of people who have one of these variants. Here we describe the protocol of the JeneScreen study—a study established to develop and evaluate two different population-based B-JFM screening programmes, offered to people of Jewish ancestry in Sydney and Melbourne, Australia. Methods and analysis To rmeasure the acceptability of population-based B-JFM screening in Australia, two screening programmes using different methodologies have been developed. The Sydn...
Personal Breast Cancer (BC) Risk Assessments (PBCRA) have potential to stratify women into clinic... more Personal Breast Cancer (BC) Risk Assessments (PBCRA) have potential to stratify women into clinically-actionable BC risk categories. As this could involve population-wide genomic testing, women’s attitudes to PBCRA and views on acceptable implementation platforms must be considered to ensure optimal population participation. We explored these issues with 31 women with different BC risk profiles through semi-structured focus group discussions or interviews. Inductive thematic coding of transcripts was performed. Subsequently, women listed factors that would impact on their decision to participate. Participants’ attitudes to PBCRA were positive. Identified themes included that PBCRA acceptance hinges on result actionability. Women value the ability to inform decision-making. Participants reported anxiety, stress, and genetic discrimination as potential barriers. The age at which PBCRA was offered, ease of access, and how results are returned held importance. Most women value the oppor...
Background Despite a modest association between tobacco smoking and breast cancer risk reported b... more Background Despite a modest association between tobacco smoking and breast cancer risk reported by recent epidemiological studies, it is still equivocal whether smoking is causally related to breast cancer risk. Methods We applied Mendelian randomisation (MR) to evaluate a potential causal effect of cigarette smoking on breast cancer risk. Both individual-level data as well as summary statistics for 164 single-nucleotide polymorphisms (SNPs) reported in genome-wide association studies of lifetime smoking index (LSI) or cigarette per day (CPD) were used to obtain MR effect estimates. Data from 108,420 invasive breast cancer cases and 87,681 controls were used for the LSI analysis and for the CPD analysis conducted among ever-smokers from 26,147 cancer cases and 26,072 controls. Sensitivity analyses were conducted to address pleiotropy. Results Genetically predicted LSI was associated with increased breast cancer risk (OR 1.18 per SD, 95% CI: 1.07–1.30, P = 0.11 × 10–2), but there was...
Background The aetiology of male breast cancer (MBC) is poorly understood. In particular, the ext... more Background The aetiology of male breast cancer (MBC) is poorly understood. In particular, the extent to which the genetic basis of MBC differs from female breast cancer (FBC) is unknown. A previous genome-wide association study (GWAS) of MBC identified two predisposition loci for the disease, both of which were also associated with risk of FBC. Methods We performed genome-wide single nucleotide polymorphism (SNP) genotyping of European ancestry MBC case subjects and controls, in three stages. Associations between directly genotyped and imputed SNPs with MBC were assessed using fixed-effects meta-analysis of 1,380 cases and 3,620 controls. Replication genotyping of 810 cases and 1,026 controls was used to validate variants with P-values < 1 x 10-06. Genetic correlation with FBC was evaluated using LD score regression, by comprehensively examining the associations of published FBC risk loci with risk of MBC and by assessing associations between a FBC polygenic risk score (PRS) and ...
Background Dilated cardiomyopathy may be heritable but shows extensive genetic heterogeneity. The... more Background Dilated cardiomyopathy may be heritable but shows extensive genetic heterogeneity. The utility of whole exome sequencing as a first‐line genetic test for patients with dilated cardiomyopathy in a contemporary “real‐world” setting has not been specifically established. Using whole exome sequencing with rigorous, evidence‐based variant interpretation, we aimed to identify the prevalence of a molecular diagnosis in patients with dilated cardiomyopathy in a clinical setting. Methods and Results Whole exome sequencing was performed in eligible patients (n=83) with idiopathic or familial dilated cardiomyopathy. Variants were prioritized for curation in up to 247 genes and classified using American College of Medical Genetics and Genomics–based criteria. Ten (12%) had a pathogenic or likely pathogenic variant. Eight (10%) participants had truncating TTN variants classified as variants of uncertain significance. Five (6%) participants had variants of unknown significance accordin...
OBJECTIVE Only risk-reducing bilateral salpingo-oophorectomy (RRBSO) has been shown to reduce ova... more OBJECTIVE Only risk-reducing bilateral salpingo-oophorectomy (RRBSO) has been shown to reduce ovarian cancer deaths in high-risk women. Uptake of RRBSO is, however, suboptimal and reasons are not well defined. More information is needed about the barriers to RRBSO and patient needs for information and care. METHODS Cross-sectional study including the Perception of Cancer Risk Scale, factors affecting decision-making about RRBSO, and unmet information needs were measured using a purpose-designed questionnaire. RESULTS Of the 193 high-risk women aged 30 to 50 approached, 60 (31%) agreed to participate. Respondents were either considering or had recently undergone premenopausal RRBSO. Most (49/60) had no personal history of cancer; 11/60 had previous breast cancer. Overall, responses did not differ between pre- and post-RRBSO participants. The main barriers to RRBSO were surgical menopause and loss of fertility. Other concerns included the impact on sexual function and bone health. Reduction in ovarian cancer risk and prolonged life expectancy were the main drivers for RRBSO. Participants understood that RRBSO reduced cancer risk, although most substantially overestimated their personal ovarian cancer risk. High-risk women wanted more information about how to manage the short- and long-term consequences of surgical menopause. CONCLUSIONS Concerns about surgical menopause and loss of fertility are barriers to RRBSO for high-risk women despite understanding the benefits of reduced cancer risk. There is an unmet need for more information about effectively managing the noncancer consequences of RRBSO in premenopausal women. : Video Summary:http://links.lww.com/MENO/A478.
Background and Aims The detection of sequence variants and copy number changes can improve diagno... more Background and Aims The detection of sequence variants and copy number changes can improve diagnosis, inform prognosis and guide treatment in patients with bone marrow failure syndromes (BMFS). We aimed to establish and prospectively assess the impact of comprehensive genomic evaluation on diagnostic categorisation and clinical outcomes in patients with genomically uncharacterised BMFS. Methods Eligible patients were recruited from four participating institutions across Victoria, Australia. Inclusion criteria were (i) age >3 months (ii) clinicopathological diagnosis or suspicion of either acquired aplastic anaemia (AA), inherited BMFS, hypoplastic myelodysplastic syndrome (hMDS) or a BMFS with marrow hypoplasia/aplasia not able to be definitively categorised. Patients initially underwent 90-gene targeted sequencing (Peter MacCallum Cancer Centre PanHaem and Myeloid Amplicon next generation sequencing [NGS] panels) for rapid turnaround of accredited results for clinical decision-m...
OBJECTIVE The aim of this study was to identify the unmet information needs of healthcare profess... more OBJECTIVE The aim of this study was to identify the unmet information needs of healthcare professionals managing risk-reducing bilateral salpingo-oophorectomy (RRBSO) in premenopausal women. METHODS A cross-sectional survey of healthcare professionals managing high-risk women in Victoria, Australia. Questions included roles and responsibilities around RRBSO, perceived barriers to uptake of RRBSO, and unmet information needs. RESULTS One hundred eighteen healthcare professionals across 10 different disciplines and specialties were approached to participate, of whom 47 completed the survey. Most respondents were genetic counselors (47%) or nurses (19%) and all worked in the public health system. Almost all (81%) provided information about RRBSO, but there was considerable uncertainty about who was responsible for making decisions with high-risk women about RRBSO. Most (85%) were "quite a bit" or "extremely" confident about informing high-risk women about ovarian cancer risk reduction from RRBSO and the surgical procedure (47%), but only one-third were "quite a bit" or "extremely" confident about discussing (36%) or managing (31%) surgical menopause. Furthermore, surgical menopause was considered the main barrier (88%, "quite a bit" or "extremely") to RRBSO. Most healthcare professionals (78%) wanted more information and resources about surgical menopause for high-risk women. CONCLUSIONS There is uncertainty around the roles and responsibilities of healthcare professionals managing high-risk women around RRBSO. Surgical menopause is perceived as a major barrier to RRBSO and healthcare professionals lack confidence in managing this outcome. : Video Summary:http://links.lww.com/MENO/A477.
The Journal of Clinical Endocrinology & Metabolism
Purpose Germline succinate dehydrogenase (SDHx) mutation carriers, especially SDHB, are at increa... more Purpose Germline succinate dehydrogenase (SDHx) mutation carriers, especially SDHB, are at increased risk for malignancy and require life-long surveillance. Current guidelines recommend periodic whole-body MRI imaging. We assessed the incremental value of 68Ga-DOTA-octreotate (GaTate) positron emission tomography (PET)/CT compared with conventional imaging in such patients. Methods SDHx mutation carriers who had GaTate PET/CT were retrospectively reviewed. Detection of lesions were compared with MRI or CT on a per-patient and per-lesion basis. Proof of lesions were based on histopathology or clinical/imaging follow-up. Results Twenty consecutive patients (median age, 46 years; 10 males) were reviewed. Fourteen patients had SDHB, four, SDHD, one SDHC, and one SDHA mutation. Fifteen had prior surgery and/or radiotherapy. Indications for PET/CT were as follows: 7 patients for surveillance for previously treated disease, 9 residual disease, 2 asymptomatic mutation carriers, and 2 for el...
Federal funding for germline genetic testing in hereditary breast and ovarian cancer (HBOC) was r... more Federal funding for germline genetic testing in hereditary breast and ovarian cancer (HBOC) was recently introduced. Germline testing for HBOC under Medicare Benefits Schedule items 73296/73297 can be requested by any specialist, whereas the previous state- and territory-funded testing was limited to those operating within a familial cancer service. The impact of this decentralisation of HBOC testing on health and economic outcomes is uncertain, primarily as it has potential to significantly disrupt the clinical framework that generated the evidence used to justify clinical implementation of the Medicare Benefits Schedules.
BackgroundUntil recently, determining penetrance required large observational cohort studies. Dat... more BackgroundUntil recently, determining penetrance required large observational cohort studies. Data from the Exome Aggregate Consortium (ExAC) allows a Bayesian approach to calculate penetrance, in that population frequencies of pathogenic germline variants should be inversely proportional to their penetrance for disease. We tested this hypothesis using data from two cohorts for succinate dehydrogenase subunits A, B and C (SDHA–C) genetic variants associated with hereditary pheochromocytoma/paraganglioma (PC/PGL).MethodsTwo cohorts were 575 unrelated Australian subjects and 1240 unrelated UK subjects, respectively, with PC/PGL in whom genetic testing had been performed. Penetrance of pathogenic SDHA–C variants was calculated by comparing allelic frequencies in cases versus controls from ExAC (removing those variants contributed by The Cancer Genome Atlas).ResultsPathogenic SDHA–C variants were identified in 106 subjects (18.4%) in cohort 1 and 317 subjects (25.6%) in cohort 2. Of 94 ...
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Papers by Alison Trainer