SWAN UK (Syndromes Without A Name)

SWAN UK is the only dedicated support network in the UK for families affected by a syndrome without a name – a genetic condition  so rare it often remains undiagnosed. 

The aim of SWAN UK is that every family gets the support that they need, regardless of whether or not they have a diagnosis. Our work involves:

  • Developing and supporting the undiagnosed community. We focus on building and nurturing a community for families of children with undiagnosed genetic conditions​​
  • Providing high-quality information and services. This ensures that families have access to the best possible support and information​​
  • Raising awareness of syndromes without a name. We work to increase public and professional understanding of the unique challenges that families face

SWAN UK community membership is completely free, with registration quick and easy.

Join here

Who does SWAN UK support?

We work with families of children and young adults up to 25 years old who are affected by an undiagnosed genetic condition.

If you answer ‘yes’ to any of the following questions we are here to help. 

  • Have you been told your child has global developmental delay (GDD) or failure to thrive but not told the reason why? 
  • Is your child  suspected to have a rare or genetic condition but more testing is needed to try and identify which one?
  • Does your child have unexplained medical, learning or physical disabilities?
  • Has your child received genetic testing results that were negative or with a variant of unknown significance?
  • Did your child take part in the Deciphering Developmental Disorders (DDD) study or the 100,000 Genomes Project, but you still don’t have a diagnosis?

I’ve recently discovered that my child might have an undiagnosed condition

People new to the SWAN UK community often feel a mixture of intense emotions, including frustration and anxiety. This might stem from a lack of support for you and your family, and professionals being unable to provide answers to the issues that your child is facing.

No matter what your circumstances are, SWAN UK welcomes you to the community. We’re here to support you and your family through your journey. 

 If you’re new to the SWAN UK community, these resources may be useful:


Additional support
  • If you or a loved one is affected by an undiagnosed genetic condition and you’re in crisis, please contact Samaritans (telephone 116 123/ email [email protected]).
  • Contact provides a Listening Ear service where parents and carers of disabled children can get practical and emotional support through 1 to 1 telephone appointments.
  • Rareminds Wellbeing Hub can help you navigate some of the more common emotional challenges that are often shared across rare, genetic and undiagnosed conditions.

Undiagnosed conditions explained

Get an explanation on single gene, chromosomal or complex disorders and more.

Learn more

What does SWAN or being undiagnosed mean?

SWAN stands for syndromes without a name. It is not a diagnosis in itself, but a term used when a child or young adult is believed to have a genetic condition and testing has failed to identify its genetic cause. Syndromes without a name are also referred to as: undiagnosed genetic conditions, unknown genetic conditions, and undiagnosed genetic disorders.

Children affected by a syndrome without a name can have a range of different symptoms and each child is likely to be affected differently. However, many SWAN children are described as having global developmental delay, learning and/or physical disabilities or complex medical needs.


Download our flyer

Read, download and share our latest flyer about SWAN UK

SWAN UK flyer 2024

What support does SWAN UK offer?

Our thriving community of individuals and families affected by a syndrome without a name provides a vital support network. This includes:

  • Online forums for families to connect, share experiences, and access support 24/7 ​​
  • Fun and inclusive events. We organise regular virtual coffee meet ups for parents, host online events, such as virtual discos and are looking forward to re-introducing face-to-face family events and information events​​
  • An understanding, empathetic and informed team. Through the SWAN UK team, which sits as part of Genetic Alliance UK, we provide those within the SWAN UK community with a way to get better informed about undiagnosed genetic conditions, and important updates in research and policy
  • Educational outreach. We support the SWAN UK community and healthcare professionals, by educating those working in the NHS about the challenges faced by families affected by a syndrome without a name
  • A chance to develop personally and professionally by volunteering as a SWAN UK Parent Rep 

To get all the benefits of SWAN UK, be sure to register for your free membership. For more information, contact the SWAN UK team.

Meet our SWAN UK families

By being part of the SWAN UK community, you will be welcomed into a warm network who understand the daily challenges of families affected by undiagnosed conditions. We’re always delighted to share the stories of SWAN UK families, who give us and others an insight into their lives.

Check out previous SWAN UK stories here

Recent stories

A young boy with glasses holds up a SWAN UK sign. He is cropped onto a bright pink background

Meet the Parkes

The Parkes family have had to battle and fight for everything since Charlie was born. Not having a diagnosis very often means you don’t tick boxes, making the journey a lot harder. Despite this, Charlie has smashed every goal and expectation anyone has ever had about him.

2 images side by side. Each of a young boy with growing hair. In one he sits in an accessibility wheelchair swing. He has his legs outstretched to either side on the railing of the equipment. The other image is a close up of his face with a happy smile on his face.

Jackson’s undiagnosed journey

Jackson has a condition so rare, it remains undiagnosed. He's got a long list of different diagnoses but the cause of his complex needs is still unknown. He also has a list of 23 different specialists helping to find answers. Jackson's mum, Bex, tells their story.

Introducing Evana

Kayley's daughter, Evana has 15q11.2 microdeletion, which they discovered after a genetic test. Kayley is part of the SWAN UK community. This is her story.

Sign up to the SWAN UK newsletter

We regularly share updates and news to the SWAN UK community through our newsletter. Sign up here to register for the newsletter, and register to be part of the SWAN UK community here.

Support SWAN UK

To make a one-off, monthly or annual donation to help continue our vital work supporting SWAN UK families and raising awareness of undiagnosed genetic conditions, visit our Donate page and choose to support SWAN UK.

If you would like to set up your own fundraiser, create your own page on either our SWAN UK or Undiagnosed Children’s Day JustGiving campaigns. Visit Ways to Give for more fundraising ideas and information and Corporate Partnerships for ways you or your organisation can help support us.

Undiagnosed Children’s Day

Undiagnosed Children’s Day is our annual awareness day held on the last Friday in April.

It’s our chance to make as much noise as we can, increase awareness of undiagnosed genetic conditions and raise funds to ensure SWAN UK can carry on providing support to families who are affected by them.

In 2024, Undiagnosed Children’s Day will be on Friday 26 April.

Contact us

If you have a question for the SWAN UK team, please email us. If you have a more general enquiry, please get in touch through Genetic Alliance UK.

The SWAN UK – England project is supported by The National Lottery Community Fund.