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  1. Klinefelter Syndrome 
    https://medlineplus.gov/klinefeltersyndrome.html
    Klinefelter syndrome (KS) is a condition that occurs in men who have an extra X chromosome. Read about ... What is Klinefelter syndrome (KS)? Klinefelter syndrome (KS) is a genetic condition that happens when a male is born with an extra ...
  2. Klinefelter syndrome 
    https://medlineplus.gov/ency/article/000382.htm
    ... XY; 47,XXY/46,XY mosaicism; Poly-X Klinefelter syndrome ... and has 1 X and 1 Y chromosome . Klinefelter syndrome results when a male child is born with ... of 46. This is written as 47, XXY. Klinefelter syndrome occurs as a random event. There is no ...
  3. Klinefelter syndrome: MedlinePlus Genetics 
    https://medlineplus.gov/genetics/condition/klinefelter-syndrome
    ... conditions. Learn more about the chromosome associated with Klinefelter syndrome x chromosome Inheritance Klinefelter syndrome is not inherited; ...
  4. X chromosome: MedlinePlus Genetics 
    https://medlineplus.gov/genetics/chromosome/x
    ... intestinal pseudo-obstruction. More About This Health Condition Klinefelter syndrome Klinefelter syndrome is a chromosomal condition that can affect physical ...
  5. Nonsyndromic 46,XX Testicular Disorders of Sex Development - GeneReviews® - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK1416
    ... karyotype and by FISH testing. Sex chromosome abnormalities Klinefelter syndrome. Klinefelter syndrome (47,XXY) and its variants (48,XXXY, 49, ... DSD. In contrast to 46,XX testicular DSD, Klinefelter syndrome is often characterized by normal or tall stature, ...
  6. xmlmplus_topics_2024-06-21.xml 
    https://medlineplus.gov/xml/mplus_topics_2024-06-21.xml
    ... male</also-called><full-summary ><h3>What is Klinefelter syndrome (KS)?</h3> <p>Klinefelter syndrome (KS) is a <a href="https://medlineplus.gov/ ... maleinfertility.html">infertility</a>.</p> <h3>What causes Klinefelter syndrome (KS)?</h3> <p>KS is not inherited. It's ...
  7. Childhood Extracranial Germ Cell Tumors Treatment (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK65877
    ... at an increased risk of extragonadal extracranial GCTs: Klinefelter syndrome—increased risk of mediastinal GCTs.[ 48 - 50 ] Patients ... mediastinal primary tumors, and nine patients (31%) had Klinefelter syndrome. In the Centers for Disease Control and Prevention' ...
  8. xmlghr-summaries.xml 
    https://medlineplus.gov/download/ghr-summaries.xml
    ... published></health-condition-summary><health-condition-summary ><name >Klinefelter syndrome</name><ghr-page >https://medlineplus.gov/genetics/condition/ ...
  9. 48,XXXY syndrome: MedlinePlus Genetics 
    https://medlineplus.gov/genetics/condition/48xxxy-syndrome
    ... a variant of another sex chromosome disorder called Klinefelter syndrome . Boys and men with Klinefelter syndrome have one extra copy of the X chromosome, ...
  10. Genetic Conditions: K 
    https://medlineplus.gov/genetics/condition-k
    ... atrophy, see Optic atrophy type 1 Kleefstra syndrome Klinefelter syndrome Klinefelter syndrome (KS), see Klinefelter syndrome Klinefelter's syndrome, see Klinefelter ...
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Klinefelter syndrome (KS) is a condition that occurs in men who have an extra X chromosome. Read about the common symptoms and treatments.

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