Rare syndromes
The World Health Organization (WHO) defines rare diseases as those that affect fewer than 65 in 100,000 people.
However, in some cases, the disease or syndrome can be so rare, that nog even 100 or 1000 cases are known around the world.
On this page you will find the extremely rare syndromes we highlight using this foundation. Right now it’s just one, but we intend to add more to this page as time goes on.
- Poretti Boltshauser syndrome