WG was established by the University of Warsaw to provide genetic diagnostic services based on the most innovative methods, elaborated by the scientists employed at the University - MDs, biologists, geneticists, bioinformaticians and mathematicians. WG offers genetic tests allowing for comprehensive estimation of the risk for developing hereditary cancers, and if cancer occurs, the staff performs somatic profiling of the tumor tissue, identifying mutations that can be a potential target of personalized therapies. Another part of company activity is related to diagnostics of rare diseases. In each case, WG analyzes all the genes known to be associated with the diagnosed disease. The diagnostic genetic tests performed at WG are based on the most innovative method - the next-generation sequencing (genomic sequencing). This method allows for simultaneous analysis of all the genes with a known association with a suspected disease (for example 24 genes associated with breast and ovarian cancer or 11 genes associated with Marfan syndrome) in a single test, reporting not only single nucleotide changes, but also large deletions and duplications. Therefore the proposed method allows for comprehensive analysis of whole regions that are responsible for production of a functional product of each gene, without the need for limiting the analysis to most common and known mutations. Thus, the delivered result contains the most comprehensive and up-to-date information on the presence of mutations in genes associated with the suspected disease or with cancer.