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  • 47,XYY syndrome - Orphanet
    The documents contained in this website are presented for information purposes only The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment
  • XYY syndrome - Wikipedia
    47,XYY is not inherited; it usually occurs as a random event during the formation of sperm cells An incident in chromosome separation during anaphase II (of meiosis II) called nondisjunction can result in sperm cells with an extra copy of the Y-chromosome
  • Double Y syndrome | About the Disease | GARD - Genetic and Rare . . .
    Double Y syndrome is caused by genetic mutations, also known as pathogenic variants Genetic mutations can be hereditary, when parents pass them down to their children, or they may occur randomly when cells are dividing
  • Diagnosis and mortality in 47,XYY persons: a registry study - Orphanet . . .
    The 47,XYY persons are diagnosed relatively late with a median age at diagnosis of 17 1 years Their total mortality is significantly increased compared to age and gender matched controls from the background population
  • 47,XYY syndrome - EMBL-EBI
    47, XYY syndrome is a sex chromosome aneuploidy where males receive an additional Y chromosome, and is characterized clinically by tall stature evident from childhood, macrocephaly, facial features (mild hypertelorism, low set ears, a mildly flat malar region), speech delay and an increased risk for social and emotional difficulties, attention
  • 47,XYY syndrome - Rare Awareness Rare Education Portal
    Individuals with 47,XYY syndrome have an extra Y chromosome and have 47 chromosomes altogether This chromosomal change occurs randomly (de novo) before birth, and are not inherited
  • XYY Syndrome | Male Chromosome Disorder
    Learn about XYY Syndrome, including symptoms, causes, and treatments If you or a loved one is affected by this condition, visit NORD to find resources and
  • Klinefelter Syndrome (47,XXY) - MSD Manuals
    Klinefelter syndrome is a chromosomal disorder in males characterized by the presence of at least 1 extra X chromosome (47,XXY) It leads to small testes, hypergonadotropic hypogonadism, infertility, tall stature, and variable degrees of cognitive, metabolic, and psychosocial impairment
  • Klinefelter Syndrome (47,XXY) - Klinefelter Syndrome (47,XXY) - Merck . . .
    Males with a normal male karyotype (XY) in some cells may be fertile and have less obvious malformations Some affected men have 3, 4, and even 5 X chromosomes along with the Y As the number of X chromosomes increases, the severity of intellectual disability and of malformations also increases
  • 47,XYY syndrome - Global Genes
    Newly diagnosed with 47,XYY syndrome? Our RARE Concierge Services Guides are available to assist you by providing information, resources and connections as you navigate your rare disease journey Get Concierge Help





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