The genetic landscape of Lynch syndrome in the Israeli population.

Deciphering the spectrum and founder disease-causing variants (DCVs) in specific populations can shape and facilitate the diagnostic process of Lynch Syndrome (LS). The aim of this report was to comprehensively update on the genetic landscape of LS in the ethnically diverse Israeli-Jewish population. The cohort included 1080 carriers from 588 families; some from underrepresented, understudied Israeli ethnic groups recruited from 8 genetic institutes and high-risk clinics throughout the country.

Clinical and genetic characteristics of carriers of the TP53 c.541C > T, p.Arg181Cys pathogenic variant causing hereditary cancer in patients of Arab-Muslim descent.

TP53 pathogenic variants cause Li-Fraumeni syndrome (LFS), with some variants causing an attenuated phenotype. Herein, we describe the clinical phenotype and genetic characteristics of carriers of NM_000546.6 (TP53): c.

Women's attitudes towards disclosure of genetic information in pregnancy with varying levels of penetrance.

Background: Chromosomal-microarray-analysis (CMA) may reveal susceptibility-loci (SL) of varied penetrance for autism-spectrum-disorder (ASD) and other neurodevelopmental conditions. Attitudes of women/parents to disclosure of SL during pregnancy are understudied.

Methods: A multiple-choice questionnaire was distributed to postpartum women.

The Diagnostic Yield and Implications of Targeted Founder Pathogenic Variant Testing in an Israeli Cohort.

Founder pathogenic variants (PVs) are prevalent in Israel. This study investigated the current practice of offering cancer patients two-step genetic testing, starting with targeted testing for recurring founder PVs, followed, if negative, by next-generation sequencing. A total of 2128 subjects with cancer or a positive family history underwent oncogenetic testing with a panel of 51 recurring PVs at a tertiary medical center in March 2020-January 2023.

Receiving uncertain results from prenatal chromosomal microarray analysis: Women's decisions on continuation or termination of pregnancy.

Background: Chromosomal microarray analysis (CMA) may detect variants of uncertain clinical significance (VUS) and susceptibility loci (SL) with incomplete penetrance for neurodevelopmental disorders. This qualitative study provides empirical data on women's experiences with receiving such findings in pregnancy and their decisions regarding continuation or termination of the pregnancy.

Methods: Semi-structured interviews were conducted with women who received a VUS and/or SL from prenatal CMA in the last 2-4 years and were analyzed using Grounded Theory.

Cancer patients' understandings of genetic variants of uncertain significance in clinical care.

Genetic variants of uncertain significance (VUSs) pose a growing challenge for patient communication and care in precision genomic medicine. To better understand patient perspectives of VUSs, we draw on qualitative analysis of semi-structured interviews with 22 cancer patients and individuals with cancer family history who received a VUS result. The majority of patients did not recall receiving VUS results and those who remembered expressed few worries, while respondents who were tested because of a family history of cancer were more concerned about the VUS results.

Postpartum women's attitudes to disclosure of adult-onset conditions in pregnancy.

Background: Advanced prenatal genomic technologies can identify risks for adult-onset (AO) conditions in the fetus, challenging the traditional purpose of prenatal testing. Professional guidelines commonly support disclosure of high-penetrance AO actionable conditions, yet attitudes of women/parents to these findings and factors affecting their attitudes are understudied.

Methods: We explored 941 (77% response rate) postpartum women's attitudes towards receiving prenatal genetic information, and associations of sociodemographic, medical and psychological characteristics with their choices, focusing on AO conditions.

Detection of copy number variants associated with late-onset conditions in ~16 200 pregnancies: parameters for disclosure and pregnancy outcome.

Background: Copy number variants (CNVs) associated with late-onset medical conditions are rare but important secondary findings in chromosomal microarray analysis (CMA) performed during pregnancy. Here, we critically review the cases at two tertiary centres to assess the criteria which guide the disclosure of such findings and develop a disclosure decision tool (DDT) aimed at facilitating disclosure decision. Parental decisions on receiving CNVs associated with risks for late-onset conditions were also recorded.

Views of Israeli healthcare professionals regarding communication of genetic variants of uncertain significance to patients.

While genomic medicine is becoming an important part of patient care with an ever-increasing diagnostic yield, communicating variants of uncertain clinical significance (VUSs) remains a major challenge. We draw on qualitative analysis of semi-structured interviews conducted in 2020 with 20 Israeli healthcare professionals and stakeholders involved in communicating the results of genome-wide sequencing to patients. Respondents described four main strategies of communicating VUSs to patients: preparing the patient pre-test for uncertainty; adapting the level of detail to the patient's needs; upgrading versus downgrading the VUS; and following up on the possible reclassification of VUSs.

Fragmented responsibility: views of Israeli HCPs regarding patient recontact following variant reclassification.

While genomic medicine is becoming an important part of patient care with an ever-increasing diagnostic yield, recontacting patients after reclassification of variants of uncertain clinical significance (VUSs) remains a major challenge. Although periodical reinterpretation of VUSs is highly desired, recontacting former patients with new classifications is commonly not fulfilled in practice. We draw on semi-structured interviews with 20 Israeli healthcare professionals and stakeholders involved in communicating the results of genome-wide sequencing to patients.

Clinicians' attitudes towards parental choice in the era of advanced genomic tests in pregnancy.

Objective: Israel is one of the first countries to incorporate chromosomal microarray analysis into routine prenatal care. We explored attitudes of Israeli healthcare professionals (HCPs) towards the disclosure of challenging findings: variants of uncertain clinical significance (VUS), susceptibility loci (SL) for neurodevelopmental disorders and variants associated with adult-onset (AO) conditions. Particularly, we sought their views on providing parental choice regarding the disclosure of these findings.

Mild Phenotype of Wolfram Syndrome Associated With a Common Pathogenic Variant Is Predicted by a Structural Model of Wolframin.

Objective: To describe the c.1672C>T; p.R558C missense variant, found in 1.

Is it time for prenatal chromosomal-microarray analysis to all women? A review of the diagnostic yield in structurally normal fetuses.

Purpose Of Review: Chromosomal-microarray analysis (CMA) is the first-tier test in pregnancies with structural malformations. Accumulating data show that pathogenic copy number variants (CNVs) can also be identified in structurally normal fetuses. We set out to summarize the published data on the diagnostic yield of CMA in structurally normal fetuses.

Re-evaluating the pathogenicity of the c.783+2T>C BAP1 germline variant.

BAP1 germline pathogenic sequence variants (PSVs) underlie a unique tumor predisposition syndrome (BAP1-TPDS) associated with an increased lifetime risk for developing primarily pleural and peritoneal mesothelioma and uveal and cutaneous melanoma. Overwhelmingly, BAP1 PSVs are unique, family-specific inactivating variants. We identified seven families, six of Jewish Iraqi origin, harboring an identical BAP1 splice variant (c.

Personalized prenatal genomic testing: Couples' experience with choice regarding uncertain and adult-onset findings from chromosomal-microarray-analysis.

Background: Chromosomal-microarray-analysis (CMA) can identify variants of uncertain clinical significance, susceptibility-loci for neurodevelopmental conditions, and risk for adult-onset conditions. We explored choices made by couples undergoing prenatal CMA, their understanding of these findings, reasons for and against receiving them, and whether they believe parents or professionals should decide which are disclosed.

Methods: Semi-structured interviews were conducted with women (n = 27) or their partners (n = 15) during the week following prenatal CMA testing and analyzed using grounded theory.

What is the meaning of a 'genomic result' in the context of pregnancy?

Prenatal genetic testing and analysis in the past was usually only offered when a particular fetal phenotype was noted or suspected, meaning that filtering and interpretation of genetic variants identified could be anchored in attempts to explain an existing health concern. Advanced genomic testing is now increasingly used in "low-risk" pregnancies, producing information on genotype adrift of the phenotypic data that is necessary to give it meaning, thus increasing the difficulty in predicting whether and how particular genetic variants might affect future development and health. A challenge to healthcare scientists, clinicians, and parents therefore is deciding what qualities prenatal genotypic variation should have in order to be constructed as a 'result.

Information Women Choose to Receive About Prenatal Chromosomal Microarray Analysis.

Objective: To examine the choices of women with both high-risk and low-risk pregnancies who are undergoing prenatal chromosomal microarray analysis in a clinical setting regarding three challenging types of findings: variants of uncertain clinical significance, susceptibility loci for neurodevelopmental disorders, and copy number variants associated with risks for adult-onset conditions. We assessed whether women's choices were associated with indications for testing or with one-on-one pretest genetic counseling.

Methods: In this cross-sectional study, medical records of women who underwent invasive prenatal chromosomal microarray analysis testing (N=1,070) at Hadassah Medical Center between June 2017 and February 2018 were examined for testing indications, choices regarding chromosomal microarray analysis findings, and type of pretest genetic counseling.

Psychiatric genetic counseling: A mapping exercise.

Psychiatric genetic counseling (PGC) is gradually developing globally, with countries in various stages of development. In some, PGC is established as a service or as part of research projects while in others, it is just emerging as a concept. In this article, we describe the current global landscape of this genetic counseling specialty and this field's professional development.

The Global State of the Genetic Counseling Profession.

The profession of genetic counseling (also called genetic counselling in many countries) began nearly 50 years ago in the United States, and has grown internationally in the past 30 years. While there have been many papers describing the profession of genetic counseling in individual countries or regions, data remains incomplete and has been published in diverse journals with limited access. As a result of the 2016 Transnational Alliance of Genetic Counseling (TAGC) conference in Barcelona, Spain, and the 2017 World Congress of Genetic Counselling in the UK, we endeavor to describe as fully as possible the global state of genetic counseling as a profession.

Pregnant Genetic Counselors in an Era of Advanced Genomic Tests: What Do the Experts Test Prenatally?

Advanced genomic tests in pregnancy, such as chromosomal microarray analysis (CMA), provide higher detection rates yet often produce probabilistic and uncertain information. This study aimed to understand how the most knowledgeable patients, i.e.

What results to disclose, when, and who decides? Healthcare professionals' views on prenatal chromosomal microarray analysis.

Objectives: This study explored the views of healthcare professionals (HCPs) in the UK about what information should be disclosed, when; and whether women/parents should be given a choice as to what they wish to know.

Methods: Q-methodology was used to assess the views of 40 HCPs (genetic HCPs, fetal medicine experts, lab-scientists).

Results: Most participants agreed that variants of unknown clinical significance should not be disclosed.

Health-care professionals' responsibility to patients' relatives in genetic medicine: a systematic review and synthesis of empirical research.

Purpose: The extent of the responsibility of health-care professionals (HCPs) to ensure that patients' relatives are told of their risk is unclear. Current international guidelines take confidentiality to the individual patient as the default position, but some suggest that disclosure could be default and genetic information could be conceptualized as familial.

Methods: Our systematic review and synthesis of 17 studies explored the attitudes of HCPs, patients, and the public regarding the extent of HCPs' responsibility to relatives with respect to disclosure.