Fact sheets Lupus Acromegaly Autosomal dominant polycystic kidney disease Castleman disease Cushing syndrome Fabry disease Primary biliary cholangitis See more Isolated Klippel-Feil syndrome on the forum What is the most frustrating or difficult... How were you diagnosed with a rare disease? What is the most frustrating or difficult... How were you diagnosed with a rare disease? See the forum Isolated Klippel-Feil syndrome