47,XYY

/47,XYY

What is XYY? Meet Uldis and Find Out

AXYS shares articles about our community members to help you gain understanding of X and Y chromosome variations on a personal level. Please enjoy this article and learn about XYY

You’d notice Uldis Silgailis. A stocky guy, 6’6’’ tall, is hard to miss. But like most men with an X or Y variation, medically known as a sex chromosome aneuploidy (SCA), everyone missed his condition. 

Uldis Silgailis shares his experience living with XYY.As a child, Uldis liked to sit quietly in the back of the class and daydream. He was a smart kid from an academically accomplished family. His teachers and family thought he was just not applying himself. “It was tough to hear the comments from ‘why are you acting so immature?’ to ‘what’s wrong with you?’ over and over.” 

He knew he was different and that school was harder for him, but nobody could explain why. In middle school his family finally got him tested. The child development experts diagnosed him with ADD and dyslexia and put him on medication. Uldis did not react well to the meds; they gave him night terrors. 

Not only was school difficult, he had physical differences too. “I had low muscle tone,” said Uldis. “That made sports challenging. I’d rather do individual activities like hiking.”  His parents required him to play sports. That was not enjoyable for a boy who had a harder time keeping up physically, found it hard to focus, and who missed social cues. Uldis was not timid physically—he loved extreme sports like glade skiing. He also loved solitude and quiet. “I’d go hide in a corner and read a magazine.”

In spite of his challenges, Uldis made it to college where he was an average student.  His love of learning served him well. “I like to go to museums, travel to places and explore. Reading about places is not enough.”

Despite social challenges, he married a college professor. When they had trouble getting pregnant they discovered he was not fertile because he produced no sperm. A low sperm count is not that unusual but to produce zero sperm was puzzling. 

Uldis wanted to know: why he did not produce any sperm? Why did he get migraines? Why was his muscle tone low? Why did his hands get shaky? Why was he so much taller than his 5’ 9” father? But then came the Internet. Uldis began to research his medical issues.

He came across something called Klinefelter Syndrome and took his knowledge to his primary care doctor. The doctor agreed to order some tests, but Uldis, tired of waiting for answers, checked off a few more boxes on the lab sheet making sure a battery of tests was ordered, increasing the likelihood that he’d finally get the answer he sought. It was good thing he did, as he discovered his hormone […]

2019-07-22T10:02:17-04:00Categories: 47,XYY|

Autism Spectrum Disorder in Males with Sex Chromosome Aneuploidy: XXY/Klinefelter syndrome, XYY, and XXYY

Article Title: Autism Spectrum Disorder in Males with Sex Chromosome Aneuploidy: XXY/Klinefelter syndrome, XYY, and XXYY

Authors: Nicole R Tartaglia, MD, Rebecca Wilson, PsyD, Judith S. Miller, PhD, Jessica Rafalko, Lisa Cordeiro, MS, Shanlee Davis, MD, David Hessl, PhD, and Judith Ross, MD

Date of Publication: April 2017

“The rate of ASD in children with SCA in this study was higher than expected compared to the general population. Males with Y chromosome aneuploidy (XYY and XXYY) were 4.8 times more likely to have a diagnosis of ASD than the XXY/KS group, and 20 times more likely than males in the general population based on the 2010 Centers for Disease Control (CDC) estimate of 1 in 42 males. ASD is an important consideration when evaluating social difficulties for children with SCA. Studies of males with SCA and Y-chromosome genes may provide insight into idiopathic ASD and male predominance in ASD.”

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2019-02-21T11:15:50-04:00Categories: 47,XXY (Klinefelter), 47,XYY, 48,XXYY|

Characterization of Autism Spectrum Disorder and Neurodevelopmental Profiles in Youth with XYY Syndrome

Article Title: Characterization of autism spectrum disorder and neurodevelopmental profiles in youth with XYY syndrome

Authors: Lisa Joseph, Cristan Farmer, Colby Chlebowski, Laura Henry, Ari Fish, Catherine Makiw, Anastasia Xenophontos, Liv Clasen, Bethany Saul, Jakob Seidlitz, Jonathan Blumenthal, Erin Torres, Audrey Thurm, and Armin Raznahan

Date of Publication: October 22, 2018

“XYY syndrome is a sex chromosome aneuploidy that occurs in ~ 1/850 male births and is associated with increased risk for neurodevelopmental difficulties. However, the profile of neurodevelopmental impairments, including symptoms of autism spectrum disorder (ASD) in XYY remains poorly understood. This gap in knowledge has persisted in part due to lack of access to patient cohorts with dense and homogeneous phenotypic data.”

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2018-11-05T21:04:17-04:00Categories: 47,XYY|

47,XYY Syndrome: Clinical Phenotype and Timing of Ascertainment

Article Title: 47,XYY Syndrome: Clinical Phenotype and Timing of Ascertainment

Authors: Martha Zeger Bardsley, Karen Kowal, Carly Levy, Ania Gosek, Natalie Ayari, Nicole Tartaglia, Najiba Lahlou, Breanna Winder, Shannon Grimes, and Judith L. Ross

Date of Publication: May 2013

“The XYY phenotype commonly includes tall stature, macrocephaly, macroorchidism, hypotonia, hypertelorism, and tremor. Physical phenotypic features were similar in boys diagnosed prenatally vs postnatally. Prenatal diagnosis was associated with higher cognitive function and less likelihood of an ASD diagnosis.”

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2018-07-31T12:54:17-04:00Categories: 47,XYY|

Parents Advocate for Son’s Educational Needs

Date of Publication: May 2017

A couple in the U.K. are fighting to help their son with 47,XYY get what he needs to be successful in school. From the original article:

“Holly Mayatt, of Sandown Road, said her son Harry, who attends All Saints Junior Academy, is struggling more and more at school due to him not being given specialist provision which she has asked for.

Harry has XYY syndrome, a rare chromosomal disorder. Symptoms may include learning disabilities and behavioural problems such as impulsivity. He also has SPD (sensory processing disorder).”

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2017-08-25T21:01:25-04:00Categories: 47,XYY|

Growing Up with XYY

Article Title: Unique – XYY

Authors: Unique – Rare Chromosome Disorder Support Group

Date of Publication: 2014

An article with general information about XYY Syndrome.

An excerpt:

“Approximately one boy in 1000 has XYY chromosomes. In the cells of their body, instead of 46 chromosomes including one X and one Y chromosome, they have one X and two Y chromosomes, making 47 in all. The impact of the extra Y chromosome is extremely variable.”

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2018-09-06T10:52:19-04:00Categories: 47,XYY|

Findings from an XYY Study

Article Title: XYY Study Day Report

Author: Unique – Rare Chromosome Disorder Support Group

Date of Publication: 2008

“Families with a son with XYY – a single extra Y chromosome – met experts and researchers at a study day in Oxford, UK in April 2008. They heard what is already known from research conducted on boys and men with XYY who were identified in the 1960s and what is starting to emerge from a follow-up study of the development of children with an extra sex chromosome, launched last summer in the UK. This study will refine and update knowledge about boys and girls aged between 4 and 16 with Triple X, XYY and XXY (Klinefelter syndrome), and in particular what is known about their behaviour and learning.”

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2018-09-12T09:46:47-04:00Categories: 47,XYY|