ORPHA:330061
Actinic prurigo
Also known as: Familial polymorphous light eruption of American Indians · Hereditary polymorphous light eruption of American Indians · Hutchinson summer prurigo · Hydroa aestivale
Publications
360
58.1th percentile
Trials
0
Interventional, condition-specific
Researchers
754
Distinct authors in sample
Gene link
—
Readiness
2/6
Stages with a signal
Clinical definition (Orphanet)
A rare, chronic, photodermatosis disease characterized by intensely pruritic, polymorphic, erythematous, excoriated and/or lichenified papules, macules, plaques and nodules, occurring on sun-exposed areas of the skin (particularly face, nose, lips, and ears), frequently associating cheilitis (especially of the lower lip) and conjuctivitis, which are present year-round or only in the spring/summer (depending on geographic location), observed mainly in Native Americans and Mestizos. Cheilitis may be the sole clinical presentation. Histologically, the presence of lymphoid follicles in mucosa is pathognomonic.
How rare: How common this is has not been clearly measured.
Cross-references
Joined from Mondo / Orphanet. MeSH labels may enter searches; UMLS / OMIM / NCIT are stored for reference.
- MONDO:0008273
- MeSH:C566780
- OMIM:174770
- UMLS:C0406217
Additional Mondo synonyms (4)
actinic prurigo · familial polymorphous light eruption of American Indians · hereditary polymorphous light eruption of American Indians · hydroa aestivale
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
Research-stage checklist from open sources (GenCC, literature, Monarch when enriched, ClinicalTrials.gov). Not a prognosis or care recommendation.
- Gene identifiedNot found
No GenCC disease–gene assertion in this build
- LiteraturePresent
360 matched papers (108 in last 10 years) Source
- Phenotype characterisedPresent
4 HPO annotations (e.g. Cheilitis; Pyoderma; Glomerulonephritis) Source
- Animal modelNot found
No Alliance genotype “model of” associations via Monarch for these Mondo IDs
- Orphan designationNot found
No FDA or EMA orphan-drug designation matched this disease via UMLS or preferred name Source
- Interventional trialNot found
No matched interventional trial under our ClinicalTrials.gov rules
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)
4
Associated phenotypes · MONDO:0008273
- Cheilitis
- Pyoderma
- Glomerulonephritis
- Cutaneous photosensitivity
Animal models (Monarch / Alliance)
None returned for this Mondo ID. Empty here is not proof that no model organism work exists under another name or gene.
Monarch fetch 2026-07-29
Therapies
Designations, candidates, and chemicals
FDA OOPD and EMA orphan designations, Open Targets clinical candidates, and CTD chemical associations via MyDisease.info. These never change the interventional-trial headline.
Orphan designation (FDA · EMA)
No designation matched this disease via UMLS or preferred name on the FDA OOPD mirror or EMA orphan register. Absence here is not proof that none exists under another wording.
Open Targets candidates
No drugs or clinical candidates returned for this Mondo ID on Open Targets.
CTD chemicals (MyDisease.info)
No CTD chemical associations returned for this Mondo ID.
Literature
Is anyone studying this?
360
360 papers have ever been published on this condition (under this name). For scale, breast cancer has over 700,000. Median papers in the last 10 years for a rare disease in this dataset (publications denominator n=3967) is 59.
360 papers since the earliest indexed year in this search — median last-10-year count for a rare disease in this dataset is 59 (publications denominator n=3967).
108 in the last 10 years · high confidence · 58.1th percentile (publications denominator)
Phrase hits: 360 · MeSH hits: 5
Who's working on it?
754
Distinct author names in 200 sampled papers — named people below.
Who's working on it?
No interventional trial matched this name; these authors publish on it in the sampled literature — a practical starting point for contact.
- 01Vega-Memije ME8 papers · 2021
Department of Dermatology, Dr Manuel Gea Gonzalez General Hospital, Mexico City, Mexico.
Papers in Europe PMC - 02Cuevas-González JC7 papers · 2021
Dermatology Department, Hospital General Dr. Manuel Gea González, México DF, Mexico.
Papers in Europe PMC - 03Hojyo-Tomoka MT7 papers · 2019
Department of Dermatology, Hospital General "Dr. Manuel Gea González," Mexico City, Mexico. dermagea@prodigy.net.mx
Papers in Europe PMC - 04Hawk JL6 papers · 2008Papers in Europe PMC
- 05Domínguez-Soto L5 papers · 2015
Dermatology Department, Hospital General Dr. Manuel Gea González, México DF, Mexico.
Papers in Europe PMC - 06Ferguson J5 papers · 2025
Consultant Dermatologist, Photobiology Unit, Ninewells Hospital and Medical School, Dundee, Scotland. j.ferguson@dundee.ac.uk
Papers in Europe PMC - 07McGregor JM5 papers · 2005
Departments of Photobiology, Tissue Typing and Medical and Molecular Genetics, Kings College, London, U.K. j.mcgregor@icrf.icnet.uk
Papers in Europe PMC - 08Rodríguez-Lobato E5 papers · 2019
Dermatology Department, Hospital General Dr. Manuel Gea González, México DF, Mexico.
Papers in Europe PMC - 09Moncada B4 papers · 2009Papers in Europe PMC
- 10Torres-Alvarez B4 papers · 2009
Department of Immunology, School of Medicine, University of San Luis Potosi, av. V.-Carranza 2405, 78210 San Luis Potosi, SLP, Mexico.
Papers in Europe PMC
Clinical research
Is a treatment being tested?
0
interventional trials for this specific condition
No interventional trial testing a treatment matched this specific condition name. 1 observational study did — shown below because natural-history and cohort work can be an important step toward a trial.
Data as of 11 September 2026 · last trial check 11 September 2026
No matched interventional trials. This is true for 77.2% of diseases in the trials denominator (5501 of 7126). Here are the researchers publishing on it.
high confidence · 38.6th percentile (trials denominator)
Recruiting interventional trials
From the matched ClinicalTrials.gov set
No interventional trial testing a treatment was found for this specific condition name on ClinicalTrials.gov.
See who's working on it — people publishing on this disease are often the practical next contact when no trial is listed.
Observational and natural-history studies
1 observational study matches 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
- NCT07055009·RECRUITING·Multi-centred Clinico-genetic Study of Actinic Prurigo in Thailand
Conditions: Actinic Prurigo·Matched via name + MeSH
Other registries (secondary)
Broader net from EU CTIS, ISRCTN, and ICTRP when available — deduped against ClinicalTrials.gov IDs already counted above. Dual-model LLM relevance gates what we keep. These rows are not added to the interventional headline.
raw 1 · after dedupe 1 · already on CT.gov 0 · kept 0 · parent 0 · uncertain 1 · dropped 0 · fetched 2026-07-30
Source notes: ictrp: Error: ICTRP public search unavailable (WHO portal is SPA-only; SOAP needs partnership). Tried: https://apps.who.int/tri
No secondary-registry studies passed dual-model relevance for this condition name (after dedupe).
Uncertain / not reviewed (1)
- isrctn·ISRCTN17160087·No longer recruiting·Home interventions and light therapy for the treatment of vitiligo
skipped — LLM skipped (--skip-llm)
Where to find support
Condition-specific patient organisations, when Orphanet lists them, are on the disease’s Orphanet page. We also link umbrella groups that support undiagnosed and ultra-rare families.
Orphanet entry for Actinic prurigo — check Associations / patient organisations on that page.
India — NPRD
Last verified 2026-07-26This 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.
"Actinic prurigo" OR "Familial polymorphous light eruption of American Indians" OR "Familial polymorphous light eruption of the American Indians" OR "Hereditary polymorphous light eruption of American Indians" OR "Hereditary polymorphous light eruption of the American Indians" OR "Hutchinson summer prurigo" OR "Hydroa aestivale"
MeSH descriptor terms unioned into the query: Actinic Prurigo
ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"Actinic prurigo" OR "Familial polymorphous light eruption of American Indians" OR "Familial polymorphous light eruption of the American Indians" OR "Hereditary polymorphous light eruption of American Indians" OR "Hereditary polymorphous light eruption of the American Indians" OR "Hutchinson summer prurigo" OR "Hydroa aestivale"
Study-type breakdown: 0 interventional · 1 observational · 0 expanded access. Only interventional studies enter the trial headline.
Query health: ok — strategies attempted: phrase, mesh; with hits: phrase, mesh
Run this search on ClinicalTrials.gov
Confidence reasoning
- Preferred label is multi-word and distinctive
- No synonyms dropped by stoplist
- No label/synonym collisions with other diseases in this corpus
Ingested 2026-07-27T14:06:11.477Z