What is a Variant of Uncertain Significance (VUS) A Variant of Uncertain Significance (VUS) is a genetic variant identified through genetic testing that cannot be clearly classified as either benign (not disease-causing) or pathogenic (disease-causing) based on the available evidence. VUS are commonly reported in tests such as gene panels, Whole Exome Sequencing (WES), or
Contents This document outlines key operational challenges encountered in large-scale genomic screening programs, with a focus on real-world implementation constraints. 1. Introduction: Beyond Sequencing In large-scale genomic screening programs, sequencing is often perceived as the central technical challenge. In practice, however, the most critical phase occurs before sequencing even begins. The successful implementation of
Newborns in NICU Critically ill newborns are usually admitted to the Neonatal Intensive Care Unit (NICU) departments. Because a critically ill newborn is often affected by a genetic disorder, trials have been made to measure the effectiveness and usefulness of rapid (or ultra-rapid) genetic testing in this special set of patients. Certain studies have also
What does “coverage” mean? Although the meaning of the term “coverage” may seem very simple, this term is often misused. In the context of Next-Generation Sequencing (NGS), coverage indicates the average number of reads that “cover” a specific target region. Coverage, therefore, always describes a relationship between the number of reads and a reference region
[siteorigin_widget class=”WP_Widget_Media_Video”][/siteorigin_widget] CNV analysis based on NGS data: has the dream come true? The term Copy Number Variations (CNVs) is traditionally referring to intermediate-scale large deletions/duplications of 1 kb to 5 kb in size. However, in practice, when the analysis is based on data from Next Generation Sequencing (NGS), CNV is used every day more
What’s the right price of whole exome sequencing? This is one of the most frequent questions I am being asked and one of the most searched on the internet: what’s the price of whole exome sequencing (which consists of the sequencing of all human genes)? Of note, whole exome sequencing does not consist in the
How large can a mutation be? Genetic variations in the human genome can differ very much in size. Starting from the smallest mutations possible, the SNV (single nucleotide variation), up to the deletion of an entire chromosome, you can find mutations of every size in the middle! The vast majority of pathogenic mutations are SNVs
Panel testing recommended at Breda Genetics for this condition: Retinitis pigmentosa, classic (ABCA4, AIPL1, ARL6, BBS2, BEST1, C2ORF71, C8ORF37, CA4, CDHR1, CERKL, CLRN1, CNGA1, CNGB1, CRB1, CRX, CYP4V2, DHDDS, EYS, FAM161A, FSCN2, GUCA1B, HGSNAT, IDH3B, IMPDH1, IMPG2, IFT172, KIZ, KLHL7, LRAT, MAK, MERTK, NEK2, NR2E3, NRL, OFD1, PDE6A, PDE6B, PDE6G, PRCD, PROM1, PRPF3, PRPF31, PRPF4,
Overview Whole genome sequencing on DNA of a single cell has been reported by several authors. Singe cell genome sequencing is of interest in a number of niche applications, such as the measuring of the genomic diversity in one individual’s gamete genomes, the mutation phase determination, and somatic DNA changes in tumors or after exposure to mutagenic agents.
Causing a developmental disorder By whole-exome and whole-genome sequencing evidence has been found that MMP21 gene mutations may cause an autosomal recessively inherited form of heterotaxy. Heterotaxy (or heterotaxia) is an abnormal positioning of the thoracic and/or abdominal organs reversing left/right with respect to normal. The incidence is approximately 1/15,000. Mutations in several other genes and all kinds of inheritance