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JOIN-HD - Juvenile onset Huntington's Disease Registry

March 15, 2021

Huntington's Disease Youth Organization

HDYO has more information about HD available for young people, parents and professionals on our site:


JOIN-HD - Juvenile onset Huntington's Disease Registry

This section is here to help you understand our new global project for those impacted by Juvenile Huntington’s Disease (JHD).

HDYO are proud to launch our JoHD Registry project, called JOIN-HD. It’s for patients and caregivers impacted by JoHD.

Sign up here


Huntington disease can occur in individuals at any age in their life - young or old. When someone who is 20 or younger develops symptoms of Huntington’s disease, they are classed as having Juvenile Huntington’s disease (JHD). So effectively ‘JHD’ means a young person with Huntington’s Disease (HD).

You can find out more about Juvenile Huntington’s Disease (JHD) on our basics of JHD article. In this project we talk about Juvenile ONSET Huntington’s Disease (JoHD). This is another way of describing Juvenile Huntington’s Disease (JHD) but we wanted to help everyone understand that adults can have JHD. If someone is 32 but because started having symptoms when they were 17, they would have Juvenile Huntington’s Disease (JHD). Onset just helps say that symptoms of HD started when they were a young person.

What is JOIN-HD?

JOIN-HD is a global project and research study that collects experiences from both young people who have JHD and their caregivers. All of the information that people add to the registry helps us understand more about JHD so that we can advocate for improvements to care, research and awareness. The information is also anonymous so that those taking part feel safe telling us about their experiences. Their personal details (name, age, country the live in etc) is not held in the same database.

The ultimate goal of a JoHD registry is to:

  • Improve advocacy, care and support for young people with JoHD and for their families.
  • Create a network of leading healthcare JoHD professionals from lots of different specialities
  • Speed up research for the JoHD community.
  • Learn what people with JoHD and their families need so we can improve support and education programmes.
  • Identify support, education and community resource connections for children and young people with JoHD and their families.

What is a Registry?

JOIN-HD is a type of project called a Patient Registry. These are databases that collect answers to a set of questions from those affected by a particular condition.

The European Medicines Agency (EMA) and The Food and Drug Administration (FDA) are two agencies (EMA covers European Union counties and FDA covers United States of America) who are responsible for ensuring that any medicines, devices or studies are being done safely, effectively and that those taking part are informed and protected. EMA and FDA both have guidelines on how Patient Registry projects should be managed because they support that those affected by conditions are vital to finding new treatments and care. HDYO has made sure that we are working to those guidelines.

Who is involved in JOIN-HD

HDYO has partnered with pharmaceutical companies, HD Research community and networks, HD patient advocacy organisations and HD families to design studies specific to the needs of those with JoHD. HDYO has been working on the framework of two registries for nearly two years now. This work has included confirming the need from the community, finding the right platform and recruiting a best-in-class medical advisory board.

HDYO Research committee is the team who are managing JOIN-HD, you can find out more about our research committee on the about us page.

Who can participate?

You can take part in JOIN-HD if one of the below describes you:

  • If you are someone who has been diagnosed with JHD
  • If you are a caregiver to someone who have been diagnosed with JHD
  • If you were a caregiver to someone who had been diagnosed with JHD

How do we get involved?

Sign up to JOIN-HD here

If you have any questions about the project then you can send a question using the Ask a Question button or by emailing registry@hdyo.org