Klinefelter syndrome

We provide treatment and care for people with Klinefelter syndrome.

Klinefelter syndrome, sometimes called Klinefelter's, KS or XXY, is when boys are born with an extra X chromosome. It affects 1 in 500 men and is one of the most common disorders of chromosomes from birth.

We hold clinics for adults and for young people aged 16 to 21.

We support all aspects of your condition. Our team includes specialists in:

We work with patient support groups including the Klinefelter Association.

Health information

The NHS website also has information about Klinefelter syndrome

Klinefelter Syndrome Association offers support and information to all affected by Klinefelter syndrome

Klinefelter syndrome clinic

Our consultants

Tet Yap, service lead

Michael Absoud

Paul Carroll

Alessandra Cocca

Awatuf El-Shirif

Simon Filson

Leila Frodsham

Davide Prezzi

Research and clinical trials

Research is vital to improving the care that you receive when you're unwell. You can help improve healthcare by taking part in research studies at our Trust. During your appointment, ask your healthcare professional about research. They'll be happy to tell you about research studies you could be eligible to join.

You can also email [email protected] for more information.

Last updated: January 2024

Contact us

Phone: 020 7188 7188, extension 56161

Email: [email protected]

Address: Rare Diseases Centre, 1st floor, South Wing, St Thomas' Hospital, Westminster Bridge Road, London SE1 7EH

Do you have any comments or concerns about your care?

Contact our Patient Advice and Liaison Service (PALS)

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