You have found us because you want to find out more about Pitt-Hopkins Syndrome in the UK.

You probably know that Pitt-Hopkins Syndrome is a very rare syndrome. It can in fact be called an ultra orphan disease. This is because there are possibly only 1 in 200,000 to 300,000 cases of PTHS in the world. That’s something like 4 in a million!

In September 2013 the members of the Pitt Hopkins UK fundraising group knew of 33 cases of PTHS in the UK. In September 2014 we were in contact with at least 40. At our PTHS UK Day in July ’14 we heard that there were about 200 diagnosed people in the UK. This meant we had contact with about 1 in 5 of all cases already diagnosed in the UK. In June 2015 we had contact with over 60 families. Some of these new families came from the DDD study.In October 2016 we have had contact with about 70 families in the UK and Ireland and it is estimated there are between 250 and 300 families in the UK. So we know there are many more families out there both diagnosed and undiagnosed. We hope to find them. If you are one of them please contact us.


The families in PitT Hopkins UK met through the International Google online Support group started by two parents , one from the US in North Carolina and one British from London (presently living in the Netherlands)

We continue to find each other through the Google Group, Facebook, Rareconnect and the International and UK websites.

We are a relatively small group of parents in the world but we are getting larger. There are now individual online support groups in Dutch, Italian, Swedish, Spanish,  French and  for families in Australia and New Zealand, and the UK. The biggest groups remain the international  Google support group and parents’ Facebook group. There are many in the group whose first language is not English.  The RareConnect group connects families in English, French, Italian, Spanish and soon Portuguese and Russian.

We are all learning about Pitt-Hopkins Syndrome together!


Between 1978, when the first people with Pitt-Hopkins Syndrome were diagnosed  and 2007 when the blood test was developed, only 7 cases were clinically diagnosed.8 years later in 2015 we know of , or have contact with , well over 600 families around the world but it is impossible to know how many other diagnosed people there are and also , of course, those yet to be diagnosed! However it is estimated that there are at least 1500 diagnosed cases in Europe alone. We hope with all our efforts to raise awareness of Pitt Hopkins Syndrome that we will find many more soon.