🧬 SyndromeScope
Syndrome reference sheet
Generated 12 Oct 2026
Immunology · Immunology / Immune dysregulation APDS syndrome
Also known as: Activated PI3K delta syndrome
Combined immunodeficiency with lymphoproliferation.
- Medical specialty
- Immunology
- Subspecialty
- Immunology / Immune dysregulation
- Sex & age distribution
- Male: affected; Female: affected; Children: yes
- Gene(s) involved
- PIK3CD, PIK3R1
Etiology & mechanism
Gain-of-function PIK3CD or loss of PIK3R1.
Gene(s) involved (2)
PIK3CDPIK3R1
Symptoms & signs (3)
herpesvirus infectionslymphadenopathyrecurrent sinopulmonary infections