Combined immunodeficiency

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Combined immunodeficiency due to LCK deficiency

ORPHA:280142Disease

Also called CID due to LCK deficiency · CID due to lymphocyte-specific protein tyrosine kinase deficiency · Combined immunodeficiency due to lymphocyte-specific protein tyrosine kinase deficiency

What it is

A rare, combined T- and B-cell immunodeficiency characterized by failure to thrive, severe diarrhea, opportunistic infections, and abnormal T-cell differentiation and function due to LCK deficiency, leading to an important risk factor for inflammation and autoimmunity.

Key facts

Prevalence
<1 / 1 000 000
Age of onset
Infancy, Neonatal
Inheritance
Autosomal recessive
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.

Gene

LCKDisease-causing germline mutation(s)

ICD-10 codes

D81.1filed under a broader ICD-10 category — shared with 8 other rare diseases

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.

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Cross-references

MONDO 0014334OMIM 615758UMLS C5191006

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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