Klinefelter syndrome beyond hypogonadism: multisystem manifestations and a framework for clinical surveillance - Takeaways - MDSpire

Klinefelter syndrome beyond hypogonadism: multisystem manifestations and a framework for clinical surveillance

  • By

  • İnan Anaforoğlu

  • June 24, 2026

  • 0 min

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  • 1

    Klinefelter syndrome (KS) is the most common male sex chromosome aneuploidy, affecting 1 in 450–600 male births.

  • 2

    The classic karyotype for KS is 47,XXY, present in approximately 90% of cases, with the rest being mosaic or higher-grade aneuploidies.

  • 3

    Men with KS have a significantly elevated risk of metabolic syndrome, with a prevalence of 34-44%, compared to about 10% in healthy males.

  • 4

    Metabolic abnormalities in KS can be observed in prepubertal boys, indicating that the chromosomal aneuploidy contributes to this phenotype.

  • 5

    Early diagnosis and a structured, multidisciplinary surveillance strategy are essential for improving long-term outcomes in individuals with KS.

Original Source(s)

Klinefelter syndrome beyond hypogonadism: multisystem manifestations and a framework for clinical surveillance

  • by İnan Anaforoğlu

  • June 24, 2026

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