Mendelian susceptibility to mycobacterial diseases

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Mendelian susceptibility to mycobacterial diseases due to partial JAK1 deficiency

ORPHA:574957Disease

Also called MSMD due to partial JAK1 deficiency · Mendelian susceptibility to mycobacterial diseases due to partial Janus kinase 1 deficiency

What it is

A rare primary immunodeficiency characterized by recurrent atypical mycobacterial infections, accompanied by relatively minor viral infections, on an immunological background of reduced induction of expression of interferon-regulated genes and dysregulated cytokine production, as revealed by laboratory studies. Global developmental delay and occurrence of non-hematopoietic malignancy at a young age have been reported in association.

Key facts

Age of onset
All ages
Inheritance
Autosomal recessive
Classified as
Disease

Gene

JAK1Disease-causing germline mutation(s)

ICD-10 codes

D84.8filed under a broader ICD-10 category — shared with 39 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.

Cross-references

MONDO 0035548UMLS C5680361

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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