Health condition
Williams syndrome in adults
Williams syndrome - a 7q11.23 deletion including the elastin gene - needs continued adult attention to arteries and blood pressure, calcium, glucose and anxiety, behind the syndrome's famously sociable presentation.
Why trust this guide
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Editorial team
Written by our editorial team from the UK sources listed on each page.
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Sourced from guidance
Checked against current NHS and UK specialist society guidance at the time of review.
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Current for 2026
Reviewed on 2026-09-27 with the next review scheduled for 2027-09-27.
Key facts
The essentials at a glance.
Which gene and test confirm it, who should be tested in the family, and which specialist to see.
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Caused by a deletion at chromosome 7q11.23 taking in the elastin (ELN) gene; almost always a new event, but an affected adult has a 50% chance of passing it on
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Cardiovascular follow-up is lifelong: supravalvular aortic stenosis, arterial narrowing and hypertension - with specific anaesthetic risks that must be flagged before any procedure
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Adult screening: blood pressure (both arms), echocardiography at intervals, calcium, glucose tolerance (diabetes is common by middle age), thyroid, hearing and eyes
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Anxiety and specific phobias are near-universal and respond to standard treatments adapted to learning profile
Understanding the condition
What it is and what happens next.
What causes it, how it is confirmed, and the testing and specialist routes available in the UK.
What it is and how it presents
Elastin insufficiency shapes Williams syndrome's medical core: arteries built with less recoil narrow and stiffen, producing the characteristic supravalvular aortic stenosis, renal artery disease and hypertension that adult clinics must keep watching even when childhood cardiology was reassuring. The cognitive and social profile - relative verbal strength, striking friendliness, visuospatial difficulty and prominent anxiety - can mislead services into underestimating support needs; independence with money, road safety and strangers rarely matches conversational impressions.
Testing, surveillance and specialist care
A sensible adult programme pairs periodic cardiovascular imaging and rigorous blood pressure management with metabolic screening - impaired glucose tolerance is one of adulthood's most consistent findings - plus mental health support for anxiety, all documented alongside an anaesthetic alert, since sedation carries genuinely elevated risk and belongs in experienced hands. Genetics services confirm the deletion where historic diagnosis was clinical and counsel on reproductive risk. NHS clinical genetics services carry some of the longest waits in the health service, often many months for a first appointment, whereas private genetic testing and a specialist review can typically be arranged within around two weeks.
Seeing a specialist
Who to see, and how quickly you can be seen.
The specialist for this condition is usually a cardiologist and endocrinologist familiar with the syndrome. Your GP can refer you on the NHS, or you can arrange a private consultation directly.
A quiet reminder
This guide is for information, not medical advice.
Your GP knows your history and can tell you which parts apply to you. If in doubt, see them - and seek urgent care for any emergency symptoms.
Frequently asked
Common questions about Williams syndrome in adults.
Quick, plain-English answers to what people ask us most.
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What is Williams syndrome in adults?
It is a genetic condition, present from birth, causing distinctive facial features, cardiovascular problems, and a characteristic profile of learning strengths and difficulties, with adults needing ongoing tailored health monitoring.
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What causes Williams syndrome?
It's caused by a small missing piece of chromosome 7, which includes several genes, occurring as a random genetic event rather than being inherited from a parent in the vast majority of cases.
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What health issues affect adults with Williams syndrome?
Common issues include cardiovascular problems (particularly narrowing of blood vessels), high blood pressure, kidney abnormalities, joint and connective tissue problems, and, for many, a distinctive sociable personality alongside specific learning needs.
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Is Williams syndrome dangerous?
With regular monitoring, many health risks can be well managed; the main serious concern is cardiovascular disease, which is why regular heart and blood pressure monitoring is an important part of lifelong care.
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Is Williams syndrome hereditary?
It usually occurs as a new, random genetic deletion rather than being inherited, and the risk of it recurring in future pregnancies for the parents is generally low, though an affected adult has a 50% chance of passing it to their own children.
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Can Williams syndrome be treated?
There's no cure for the underlying genetic condition, but the associated health issues, such as high blood pressure, heart problems, and specific learning needs, can be actively managed and supported.
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How is Williams syndrome managed in adults?
Management includes regular cardiovascular monitoring, blood pressure checks, kidney function assessment, and ongoing support tailored to individual learning and social needs, typically coordinated through specialist genetics or general medicine input.
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How often should adults with Williams syndrome have specialist follow-up?
Regular follow-up, often annually, focusing on cardiovascular health, blood pressure, and other associated issues is generally recommended throughout life.
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When should I see a specialist, and how quickly can I be seen privately?
Ongoing specialist follow-up is recommended for all adults with Williams syndrome. NHS specialist clinics can have long waits; private specialists can often see you within about two weeks.