Explore rare diseases in clinical trials
Check which rare diseases are currently being frequently studied.
See also our popular diseases glossary and drug database.
Starting by letter
To open the rare diseases glossary, select a letter from the list below.
Rare diseases starting with “x”
- 1
X-linked lymphoproliferative syndrome
X-linked lymphoproliferative syndrome is a rare genetic disorder that affects how the immune system responds to infections, particularly the Epstein-Barr virus. This condition primarily affects males and can lead to serious, life-threatening complications if left untreated.