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AXYS - The Association for X&Y Chromosome Variations
Helpline: 1‑267‑338‑4262 | info@genetic.org

47,XYY

Recommendations to improve the patient experience and avoid bias when prenatal screening/testing

Article Title: Recommendations to improve the patient experience and avoid bias when prenatal screening/testing

Authors: Meredith, Brackett, Diaz, Freeman, Huggins, Khan, Leach, Levitz, Michie, Onufer, Skotko, Smith, White, Waller, and Ayers

Date of Publication: October 29, 2022

“While prenatal screening and testing have expanded substantially over the past decade and provide access to more genetic information, expectant parents are more likely to describe the diagnosis experience as negative than positive. In addition, the conversations that take place during these experiences sometimes reflect unconscious bias against people with disabilities. Consequently, an interdisciplinary committee of experts, including people with disabilities, family members, disability organization leaders, healthcare and genetics professionals, and bioethicists, reviewed selected published and gray literature comparing the current state of the administration of prenatal testing to the ideal state. Subsequently, the interdisciplinary team created recommendations for clinicians, public health agencies, medical organizations, federal agencies, and other stakeholders involved with administering prenatal screening and testing to create better patient experiences; conduct training for healthcare professionals; create, enforce, and fund policies and guidelines; and engage in more robust data collection and research efforts.”

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Supernumerary sex chromosome abnormalities – new developments and future trajectories

Article Title: Supernumerary sex chromosome abnormalities – new developments and future trajectories – A summary of the 2022 3rd International Workshop on Klinefelter syndrome, XYY and Trisomy X

Authors: Gravholt, Ferlin, Gromoll, Juul, Raznahan, Van Rijn, Rogol, Skakkebæk, Tartaglia, and Swaab

Date of Publication: January 4, 2023

“The 3rd International Workshop on Klinefelter Syndrome, Trisomy X, and 47,XYY syndrome was held in Leiden, the Netherlands, on September 12-14, 2022. Here, we review new data presented at the workshop and discuss scientific and clinical trajectories. We focus on shortcomings in knowledge and therefore point out future areas for research.”

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Early impact of X- and Y-chromosome variations on social communication and social emotional development in 1–2-year-old children

Article Title: Early impact of X- and Y-chromosome variations (XXX, XXY, XYY) on social communication and social emotional development in 1–2-year-old children

Authors: Bouw, Swaab, Tartaglia, Jansen, and Van Rijn

Date of Publication: February 18, 2022

“These findings suggest that SCT [sex chromosome trisomies] impact the maturation of the social brain already from an early age, and stress the importance of early monitoring and (preventive) support early social development in young children with SCT.”

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2022-12-02T13:45:58-05:00Categories: 47,XXX (trisomy x), 47,XXY (Klinefelter), 47,XYY|Tags: |

Positive predictive value of noninvasive prenatal testing for sex chromosome abnormalities

Article Title: Positive predictive value of noninvasive prenatal testing for sex chromosome abnormalities

Authors: Guo, Cai, Lin, Xue, Huang, and Xu

Date of Publication: August 12, 2022

A clinic had 47,855 patients undergo NIPT (noninvasive prenatal testing). They found that the positive predictive value (PPV) for sex chromosome abnormalities was 36.9%. The PPV in patients aged 30–34 years was significantly higher than that in patients aged < 30 years.

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Noninvasive prenatal screening (NIPS) results for participants of the eXtraordinarY babies study

Article Title: Noninvasive prenatal screening (NIPS) results for participants of the eXtraordinarY babies study: Screening, counseling, diagnosis, and discordance

Authors: Howell, Davis, Thompson, Brown, Tanda, Kowal, Alston, Ross, and Tartaglia

Date of Publication: September 6, 2022

“The majority (57%) of parents with a NIPS result positive for SCA defer diagnostic confirmation until birth; however, diagnostic results can be discordant with NIPS results, which may impact genetic counseling.”

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Mosaic double aneuploidy: Down syndrome and XYY

Article Title: Mosaic double aneuploidy: Down syndrome and XYY

Authors: Parihar, Koshy, and Srivastava

Date of Publication: July 2013

“Down syndrome (trisomy 21) is the most common aneuploidy seen in live born infants. Rarely, infants with typical phenotypic features of Down syndrome may have an additional aneuploidy. We report a patient with Down syndrome who had mosaicism for XYY. There is only one other report of such a patient.”

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2022-10-19T13:09:07-04:00Categories: 47,XYY, Mosaicism|

Early symptoms of autism spectrum disorder in children with sex chromosome trisomies

Article Title: Early symptoms of autism spectrum disorder (ASD) in 1–8 year old children with sex chromosome trisomies (XXX, XXY, XYY), and the predictive value of joint attention

Authors: Bouw, Swaab, Tartaglia, Wilson, van der Velde, and van Rijn

Date of Publication: September 15, 2022

“These findings show a neurodevelopmental impact of the extra X or Y chromosome on social adaptive development associated with risk for ASD already from early childhood onward. These findings advocate for close monitoring and early (preventive) support, aimed to optimize social development of young children with SCT.”

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Emotional reactivity and expressivity in young children with sex chromosome trisomies

Article Title: Emotional reactivity and expressivity in young children with sex chromosome trisomies: evidence from psychophysiological and observational data

Authors: Kuiper, Swaab, Tartaglia, Cordeiro, and van Rijn

Date of Publication: July 25, 2022

“Although sex chromosomal trisomies (SCT) in children are highly prevalent and associated with an increased risk for neurodevelopmental difficulties including socio-emotional problems, little is known about underlying mechanisms that could drive this risk. Studying emotional reactivity and expressivity of young children with SCT in early childhood could identify deviations in early emotional development and potentially serve as risk markers to guide clinical care in developing interventions.”

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2022-12-08T11:47:14-05:00Categories: 47,XXX (trisomy x), 47,XXY (Klinefelter), 47,XYY|

Supporting students with sex chromosome aneuploidies in educational settings

Article Title: Supporting students with sex chromosome aneuploidies in educational settings: Results of a nationwide survey

Authors: Thompson, Davis, Janusz, Frith, Pylead, Howell, Boada, Wilson, and Tartaglia

Date of Publication: August 2022

“Many parents reported their children’s educators had little to no knowledge of SCA conditions, justifying a need to train teachers and policy makers in the unique educational needs of children and adolescents with SCAs. School psychologists should be aware of the frequent need for accommodations and individualized support plans in this population so they can support children and families by advocating for early and comprehensive evaluations and intervention plans.”

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Detection and characterization of male sex chromosome abnormalities in the UK Biobank study

Article Title: Detection and characterization of male sex chromosome abnormalities in the UK Biobank study

Authors: Zhao, Gardner, Tuke, Zhang, Pietzner, Koprulu, Jia, Ruth, Wood, Beaumont, Tyrrell, Jones, Lango Allen, Day, Langenberg, Frayling, Weedon, Perry, Ong, and Murray

Date of Publication: May 16, 2022

Purpose: The study aimed to systematically ascertain male sex chromosome abnormalities, 47,XXY (Klinefelter syndrome [KS]) and 47,XYY, and characterize their risks of adverse health outcomes.”

Conclusion: KS and 47,XYY were mostly unrecognized but conferred substantially higher risks for metabolic, vascular, and respiratory diseases, which were only partially explained by higher levels of body mass index, deprivation, and smoking.”

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2022-06-13T15:18:29-04:00Categories: 47,XXY (Klinefelter), 47,XYY|
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