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Start free with EleplanAutoimmune lymphoproliferative syndrome due to CTLA4 haploinsuffiency
ORPHA:436159Disease
Also called ALPS due to CTLA4 haploinsuffiency · CHAI · CTLA-4 haploinsufficiency with autoimmune infiltration disease
What it is
A rare, primary immunodeficiency characterized by variable combination of enteropathy, hypogammaglobulinemia, recurrent respiratory infections, granulomatous lymphocytic interstitial lung disease, lymphocytic infiltration of non-lymphoid organs (intestine, lung, brain, bone marrow, kidney), autoimmune thrombocytopenia or neutropenia, autoimmune hemolytic anemia and lymphadenopathy.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Adolescent, Adult, Childhood
- Inheritance
- Autosomal dominant
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
Signs and symptoms
Common30–79%
13- Atopic dermatitis
- Autoimmune hemolytic anemia
- Autoimmune thrombocytopenia
- Decreased circulating IgA level
- Decreased circulating IgG level
- Decreased circulating total IgM
- Diarrhea
- Hepatomegaly
- Lymphadenopathy
- Pneumonia
- Recurrent lower respiratory tract infections
- Recurrent upper respiratory tract infections
- Splenomegaly
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
Gene
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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