Klinefelter syndrome: going beyond the diagnosis

Area of Science:

• Pediatrics
• Endocrinology
• Genetics

Background:

• Klinefelter syndrome (KS) is a common genetic condition, yet frequently unrecognized during childhood.
• Diagnosis often occurs due to developmental delays or incidentally during antenatal scans.
• Testicular dysfunction is the sole consistent feature across all individuals with KS.

Purpose of the Study:

• To review the presentation and management of Klinefelter syndrome in childhood and adolescence.
• To highlight the importance of early intervention for developmental and psychological support.
• To discuss current understanding and future directions in managing hypogonadism and fertility in KS.

Main Methods:

• Review of existing literature on Klinefelter syndrome.
• Analysis of clinical features, diagnostic criteria, and treatment strategies.
• Discussion of developmental, psychological, and reproductive aspects.

Main Results:

• Boys with KS exhibit normal birth size but accelerated growth in childhood, leading to greater adult height.
• Gynaecomastia occurs in 35.6% of cases and can be managed with testosterone supplementation.
• Approximately two-thirds of boys with KS require speech, language, or developmental support, emphasizing the need for early intervention.
• Impaired social cognition and fertility issues are significant concerns requiring proactive management.

Conclusions:

• Early diagnosis and intervention, including speech therapy and psychological support, are vital for boys with KS.
• Testosterone supplementation can manage hypogonadism and gynaecomastia, with optimal timing requiring further study.
• Reproductive health, including fertility preservation options like testicular sperm extraction, should be addressed proactively during adolescence.