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ORPHA:761

Immunoglobulin A vasculitis

low confidenceDisorder

Also known as: Anaphylactoid purpura · Henoch-Schönlein purpura · IgA vasculitis · Purpura rheumatica · Rheumatoid purpura

Publications

13,210

Trials

16

Interventional, condition-specific

Researchers

1,057

Distinct authors in sample

Gene link

—

Readiness

2/6

Stages with a signal

Clinical definition (Orphanet)

A rare, small-vessel vasculitis characterized by skin purpura, arthritis, abdominal and/or renal involvement, IgA tissue deposits (arterioles, capillaries, and venules) and circulating IgA immune complexes.

How rare: How common this is has not been clearly measured.

Orphanet entry

Cross-references

Joined from Mondo / Orphanet. MeSH labels may enter searches; UMLS / OMIM / NCIT are stored for reference.

Additional Mondo synonyms (6)

HSP · Schoenlein-Henoch purpura · allergic purpura · anaphylactoid purpura · purpura rheumatica · rheumatoid purpura

Research stages

Trial readiness signals

Where this condition sits on an open-data research pipeline — not how close a treatment is, and not medical advice. Empty stages often mean “not in these databases under this Mondo ID,” not “impossible.”

2/6 stages with a signal

An interventional trial matched this condition name on ClinicalTrials.gov — see trials below.

  1. Gene identifiedNot found

    No GenCC disease–gene assertion in this build

  2. LiteraturePresent

    13,210 matched papers (6,294 in last 10 years) Source

  3. Phenotype characterisedNot checked

    Not yet enriched from Monarch / HPO

  4. Animal modelNot checked

    Not yet enriched from Monarch / Alliance

  5. Orphan designationNot checked

    FDA/EMA orphan-drug designation not enriched yet

  6. Interventional trialPresent

    16 matched on ClinicalTrials.gov (9 recruiting in sample)

Biology

Genes and phenotypes

Gene–disease validity from GenCC, plus phenotypes and animal models joined from Monarch Initiative via Mondo ID — not a clinical diagnosis aid.

Do we know what causes it?

Not yet — the cause hasn't been pinned down in GenCC.

No strong gene–disease assertion joined for this Orphanet entity.

Phenotypes (Monarch / HPO)

Not enriched in this build — Monarch phenotype joins were not run for this record.

Animal models (Monarch / Alliance)

Not enriched in this build.

Literature

Is anyone studying this?

13,210

13,210 papers — among the better-studied rare conditions, though still a fraction of common-disease literature (breast cancer: over 700,000). Median papers in the last 10 years for a rare disease in this dataset (publications denominator n=5449) is 41.

13,210 papers since the earliest indexed year in this search — median last-10-year count for a rare disease in this dataset is 41 (publications denominator n=5449).

6,294 in the last 10 years · low confidence

Phrase hits: 13,210 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

1,057

Distinct author names in 200 sampled papers — named people below.

Who's working on it?

People publishing on this condition (sampled Europe PMC records). Affiliation is the most recent found in that sample.

  1. 01
    Zhang X8 papers · 2026

    Pediatric Hospital of the First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan, China.

    Papers in Europe PMC
  2. 02
    Wang Y7 papers · 2026

    The Second Hospital and Clinical Medical School, Lanzhou University, Lanzhou, 730000, Gansu, People's Republic of China.

    Papers in Europe PMC
  3. 03
    Xu Y7 papers · 2026

    Pediatric Hospital of the First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan, China.

    Papers in Europe PMC
  4. 04
    Zhang L6 papers · 2026

    Department of Pediatrics, Yunnan University of Traditional Chinese Medicine, Kunming, Yunnan, China.

    Papers in Europe PMC
  5. 05
    Hu Y5 papers · 2026

    Gastroenterology and Hepatology, , Affiliated Jinhua Hospital, Zhejiang University School of Medicine .

    Papers in Europe PMC
  6. 06
    Li L5 papers · 2026

    The Second Department of Pediatric Internal Medicine, The First People's Hospital of Kashi, Kashi, Xinjiang, China.

    Papers in Europe PMC
  7. 07
    Ren X5 papers · 2026

    Pediatric Hospital of the First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan, China.

    Papers in Europe PMC
  8. 08
    Zhang Y5 papers · 2026

    Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.

    Papers in Europe PMC
  9. 09
    Boghițoiu D4 papers · 2025

    Discipline of Pediatrics, Faculty of Dentistry, "Carol Davila" University of Medicine and Pharmacy, 020021 Bucharest, Romania.

    Papers in Europe PMC
  10. 10
    Chen J4 papers · 2026

    Department of Clinical Medicine, North Sichuan Medical College, Nanchong, Sichuan Province, People's Republic of China.

    Papers in Europe PMC

Clinical research

Is a treatment being tested?

16

interventional trials for this specific condition

16 interventional trials matched this specific condition name; 9 currently recruiting in our sample. 186 trials are registered for vasculitis, the broader category — shown separately because they may or may not enrol this specific subtype.

Data as of 27 July 2026

16 interventional trials — more than 73% of diseases in the trials denominator have none at all (5114 of 7003; this disease is at the 93.7th percentile).

low confidence · 93.7th percentile (trials denominator)

Recruiting interventional trials

From the matched ClinicalTrials.gov set

16 interventional trials matched after quoted-phrase search and title/condition post-filter.

Broader category: vasculitis

186

Interventional trials for the parent category, exclusive of NCT IDs already counted above. Eligibility for this subtype is not guaranteed.

Worth raising with a clinician. How we count trials.

Recruiting under the broader category

Observational and natural-history studies

9 observational studies match this condition. These do not test a treatment and are not counted in the interventional-trial headline, but they are genuine research: natural-history work often defines the endpoints needed for a future rare-disease trial, and families may be able to enroll.

Recruiting or not-yet-recruiting

Open the complete matched search on ClinicalTrials.gov

Where to find support

We do not yet link condition-specific patient organisations. These umbrella groups support undiagnosed and ultra-rare families:

India — NPRD

Last verified 2026-07-26

This ORPHAcode is not on our curated NPRD list (direct or Mondo-parent match). That does not decide clinical eligibility; families in India should ask a notified Centre of Excellence about current coverage.

Hand-curated for this project. ORPHAcode mappings are best-effort and may be incomplete or imprecise for umbrella categories. Parent (Mondo) matches mean the policy lists a broader category — confirm eligibility with a Centre of Excellence. Financial entitlements summarised from public policy statements and may change. This is not official government guidance.

How we counted this

Europe PMC query (preferred label + any corrected label + Orphanet and Mondo exact synonyms, stoplisted; unioned with resolved MeSH labels when available). UMLS / OMIM / NCIT cross-references are stored on the overview but are not added to the query string.

"Immunoglobulin A vasculitis" OR "Anaphylactoid purpura" OR "Henoch-Schönlein purpura" OR "IgA vasculitis" OR "Purpura rheumatica" OR "Rheumatoid purpura" OR "Schoenlein-Henoch purpura" OR "allergic purpura"

Run this search on Europe PMC

ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):

"Immunoglobulin A vasculitis" OR "Anaphylactoid purpura" OR "Henoch-Schönlein purpura" OR "IgA vasculitis" OR "Purpura rheumatica" OR "Rheumatoid purpura" OR "Schoenlein-Henoch purpura" OR "allergic purpura"

Interventional trials matched via: phrase (mesh = registered under a MeSH descriptor no name phrase would catch; recall-expansion = gene / selected parent terms used only for trials).

Study-type breakdown: 16 interventional · 9 observational · 0 expanded access. Only interventional studies enter the trial headline.

Parent-category trials query:

"vasculitis"

Query health: ok — strategies attempted: phrase; with hits: phrase

Run this search on ClinicalTrials.gov

Synonyms dropped by stoplist: HSP

Confidence reasoning

  • Preferred label is multi-word and distinctive
  • 1 synonym(s) dropped by stoplist (may under-count)
  • No label/synonym collisions with other diseases in this corpus
  • Publication count (13210) is extremely high with unknown/missing prevalence — treat as possible over-matching, not proven research intensity

Ingested 2026-07-26T15:15:28.511Z