raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:555905

IgA pemphigus

Type
Disease
Group
Disorder
Inheritance
Not applicable
Age of onset
All ages
Status
active

A rare autoimmune bullous skin disease characterized by painful and pruritic vesiculopustular eruptions resulting from circulating IgA antibodies against keratinocyte cell surface components. The lesions are typically found at the periphery of erythematous annular plaques and favor intertriginous regions. Histologically and immunologically, IgA pemphigus can be subdivided into subcorneal pustular dermatosis and intraepidermal neutrophilic IgA dermatosis.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enIgA pemphigus
frPemphigus à IgA
deIgA-Pemphigus
esPénfigo IgA
itPemfigo ad IgA
nlIgA-pemfigus
ptPenfigo IgA
plPęcherzyca IgA
csIgA pemfigus
ukIgA пемфігус
zhIgA天疱疮
trIgA pemfigus

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10L10.8NTBTattributedvalidated
ICD-11EB40.YNTBTindexvalidated
MONDO0034127Evalidated
UMLSC1274167Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (1):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyValidatedORPHANET_30085605[PMID]

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

19 annotations · validated 2021-06-09
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0008066Abnormal blistering of the skin
HP:0031234Neutrophilic infiltration of the skin
HP:0200037Skin vesicle
Frequent (79-30%)
HP:0100792Acantholysis
HP:0030057Autoimmune antibody positivity
HP:0011354Generalized abnormality of skin
HP:0031539Linear IgA deposits along the epidermal basement membrane zone
HP:0200097Oral mucosal blisters
HP:0012531Pain
HP:0000989Pruritus
HP:0200039Pustule
HP:0200041Skin erosion
HP:0200035Skin plaque
Occasional (29-5%)
HP:0025528Annular cutaneous lesion
HP:0031292Cutaneous abscess
HP:0003261Increased circulating IgA level
HP:0001880Increased total eosinophil count
HP:0032335Monoclonal elevation of circulating IgA
HP:0100279Ulcerative colitis

Run the differential on the 3 obligate / very frequent terms

Annotation source: 31812619[PMID]_30085605[PMID]_27279313[PMID]_26566588[PMID]

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Sources for this card