raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:49041

IgG4-related retroperitoneal fibrosis

Synonyms: Idiopathic retroperitoneal fibrosis · Ormond disease

Type
Clinical subtype
Group
Subtype of disorder
Inheritance
Not applicable, Unknown
Age of onset
Adult
Status
active

A rare systemic autoimmune disease characterized by mass-forming, potentially destructive inflammation and fibrosis in the soft tissues of the retroperitoneum, associated with elevation of serum IgG4 levels and infiltration of IgG4-positive plasma cells in at least one organ or site. Most frequent locations are peripheral to the abdominal aorta, as well as the iliac and renal arteries. Clinical symptoms are unspecific and include abdominal pain, back pain, and edema of the lower extremities. The condition may occur together with IgG4-related disease in other parts of the body.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enIgG4-related retroperitoneal fibrosisIdiopathic retroperitoneal fibrosis · Ormond disease
frFibrose rétropéritonéale associée à IgG4Fibrose rétropéritonéale idiopathique · Maladie d'Ormond
deRetroperitonealfibrose, IgG4-assoziierteIdiopathische retroperitoneale Fibrose · Ormond-Krankheit
esFibrosis retroperitoneal asociada a IgG4Enfermedad de Ormond · Fibrosis retroperitoneal idiopática
itFibrosi retroperitoneale correlata alle IgG4Fibrosi retroperitoneale · Malattia di Ormond
nlIgG4-gerelateerde retroperitoneale fibroseIdiopathische retroperitoneale fibrose · Ziekte van Ormond
ptFibrose retroperitoneal IgG4-relacionadaDoença de Ormond
plWłóknienie zaotrzewnowe zależne od IgG4Choroba Ormonda · Idiopatyczna włóknienie zaotrzewnowe
csIgG4 asociovaná retroperitoneální fibrózaOrmondova choroba · Idiopatická retroperitoneální fibróza
ukРетроперитонеальний фіброз, повязаний з IgG4Ідіопатичний ретроперитонеальний фіброз · Хвороба Ормонда
zhIgG4相关性腹膜后纤维化特发性腹膜后纤维化
trIgG4--ilişkili retroperitoneal fibrozOrmond hastalığı · İdiyopatik retroperitoneal fibroz

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM228800BTNTvalidated
ICD-10K66.2Especificvalidated
ICD-114A43.0NTBTindexvalidated
MONDO0018848Evalidated
MeSHD012185Evalidated
UMLSC0035357Evalidated
GARD9568Evalidated
MedDRA10038979Evalidated

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 (2):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

3 records
TypeClassValueAreaQualificationValidationSource
Annual incidence1-9 / 1 000 0000.35 / 100 000EuropeValue and classValidated[EXPERT]
Point prevalence1-9 / 100 000—FinlandClass onlyNot yet validated16427494[PMID]
Point prevalence1-9 / 100 000—EuropeClass onlyNot yet validatedORPHANET

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

43 annotations · validated 2025-06-19
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0012531Pain
Frequent (79-30%)
HP:0002027Abdominal pain
HP:0002039Anorexia
HP:0025379Anti-thyroid peroxidase antibody positivity
HP:0031191Deep dermal perivascular inflammatory infiltrate
HP:0011227Elevated circulating C-reactive protein concentration
HP:0003259Elevated circulating creatinine concentration
HP:0003565Elevated erythrocyte sedimentation rate
HP:0012378Fatigue
HP:0030157Flank pain
HP:0000126Hydronephrosis
HP:0000822Hypertension
HP:0003138Increased blood urea nitrogen
HP:0005310Large vessel vasculitis
HP:0003419Low back pain
HP:0001897Normocytic anemia
HP:0000083Renal insufficiency
HP:0012583Unilateral renal hypoplasia
HP:0001824Weight loss
Occasional (29-5%)
HP:0001919Acute kidney injury
HP:0003453Antineutrophil antibody positivity
HP:0002019Constipation
HP:0001945Fever
HP:0000872Hashimoto thyroiditis
HP:0012578Membranous nephropathy
HP:0002017Nausea and vomiting
HP:0010741Pedal edema
HP:0003765Psoriasiform dermatitis
HP:0001370Rheumatoid arthritis
HP:0002923Rheumatoid factor positive
HP:0003262Smooth muscle antibody positivity
HP:0002725Systemic lupus erythematosus
HP:0000074Ureteropelvic junction obstruction
Very rare (<4-1%)
HP:0002639Budd-Chiari syndrome
HP:0100518Dysuria
HP:0000790Hematuria
HP:0000034Hydrocele testis
HP:0000802Impotence
HP:0000100Nephrotic syndrome
HP:0008682Renal tubular epithelial necrosis
HP:0100817Renovascular hypertension
HP:0012877Retrograde ejaculation
HP:0012871Varicocele

Run the differential on the 1 obligate / very frequent terms

Annotation source: 37868965[PMID]_31796497[PMID]_34669430[PMID]_

7

Sources for this card