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Syndrome reference sheet
Generated 12 Oct 2026
Immunology · Immunology / Autoinflammatory disorders

Haploinsufficiency of A20 syndrome

Also known as: HA20

Behçet-like autoinflammation.

Medical specialty
Immunology
Subspecialty
Immunology / Autoinflammatory disorders
Sex & age distribution
Male: affected; Female: affected; Children: yes
Gene(s) involved
TNFAIP3

Etiology & mechanism

TNFAIP3 haploinsufficiency.

Gene(s) involved (1)

TNFAIP3

Symptoms & signs (4)

arthritisfevergenital ulcersoral ulcers
SyndromeScope — educational reference. Content is model-generated and not clinically verified; always confirm against OMIM, Orphanet and GeneReviews before clinical use.