Publications by authors named "D B Bellissimo"

Purpose: To determine the pathogenicity and frequency of copy-number variants (CNV) in the 81 secondary finding (SFv3.2) genes recommended by the American College of Medical Genetics and Genomics (ACMG).

Methods: Review of published evidence on pathogenicity of partial or complete copy-number losses or gains in ACMG SFv3.

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Purpose: The specialty of Laboratory Genetics and Genomics (LGG) was created in 2017 in an effort to reflect the increasing convergence in technologies and approaches between clinical molecular genetics and clinical cytogenetics. However, there has not yet been any formal evaluation of the merging of these disciplines and the challenges faced by Program Directors (PDs) tasked with ensuring the successful training of laboratory geneticists under the new model.

Methods: An electronic multi-question Qualtrics survey was created and was sent to the PD for each of the Accreditation Council for Graduate Medical Education-accredited LGG fellowship programs at the time.

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This case report chronicles the diagnostic odyssey and resolution of a 27-year-old female with a complex neurodevelopmental disorder (NDD) using Whole Exome Sequencing (WES). The patient presented to a precision medicine clinic with multiple diagnoses including intellectual disability, autism spectrum disorder (ASD), obsessive-compulsive disorder (OCD), tics, seizures, and pediatric autoimmune neuropsychiatric disorders associated with streptococcal infections (PANDAS). Although this patient previously had chromosomal microarray and several single-gene tests, the underlying cause of this patient's symptoms remained elusive.

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Article Synopsis
  • Genetic analysis for von Willebrand disease (VWD) often misses copy-number variants (CNVs), prompting a study to further characterize these variants in patients without known VWF mutations.* -
  • The research included 204 VWF mutation-negative patients and used a specialized genomic hybridization array, identifying 24 CNVs across 7 unique variations, with one being novel.* -
  • Findings revealed a specific in-frame deletion linked to type 1C VWD associated with altered levels of VWF activity, suggesting CNVs may significantly impact the disease's characteristics compared to single base mutations.*
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