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ORPHA:91413

Congenital Horner syndrome

high confidenceDisorder

Also known as: Congenital Claude-Bernard-Horner syndrome

Query health: suspect — Only one of 2 strategies returned hits (phrase).

Publications

146

49.2th percentile

Trials

0

Interventional, condition-specific

Researchers

1,187

Distinct authors in sample

Gene link

—

Readiness

3/6

Stages with a signal

Clinical definition (Orphanet)

Horner syndrome is a rare neurological disorder characterized by relative pupillary miosis and blepharoptosis, evident at birth, caused by interruption of the oculosympathetic innervation at any point along the neural pathway from the hypothalamus to the orbit. Often additional symptoms, such as enophthalmos, facial anhidrosis, iris heterochromia, conjunctival congestion, transient and/or pupillary dilation lag, may be present. Association with birth trauma, neoplasms or vascular malformations has been reported.

Orphanet entry

Cross-references

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

Additional Mondo synonyms (3)

congenital Claude-Bernard-Horner syndrome · congenital Horner syndrome · congenital Horner syndrome (disease)

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.”

3/6 stages with a signal

No specific-condition interventional trial, but broader-category trials exist — discuss eligibility with a clinician.

  1. Gene identifiedNot found

    No GenCC disease–gene assertion in this build

  2. LiteraturePresent

    146 matched papers (57 in last 10 years) Source

  3. Phenotype characterisedPresent

    5 HPO annotations (e.g. Heterochromia iridis; Congenital Horner syndrome; Deeply set eye) Source

  4. Animal modelNot found

    No Alliance genotype “model of” associations via Monarch for these Mondo IDs

  5. Orphan designationNot found

    No FDA or EMA orphan-drug designation matched this disease via UMLS or preferred name Source

  6. Interventional trialPartial

    None under the specific name; 1 for broader category Horner syndrome

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)

5

Associated phenotypes · MONDO:0007735

  • Heterochromia iridis
  • Congenital Horner syndrome
  • Deeply set eye
  • Ipsilateral lack of facial sweating
  • Paralysis

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?

146

146 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.

146 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).

57 in the last 10 years · high confidence · 49.2th percentile (publications denominator)

Phrase hits: 146 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

1,187

Distinct author names in 146 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.

  1. 01
    Zhang Y10 papers · 2016

    Duke University, Durham, NC USA

    Papers in Europe PMC
  2. 02
    Konofagou E9 papers · 2016

    Columbia University, New York, NY USA

    Papers in Europe PMC
  3. 03
    McDannold N9 papers · 2016

    Brigham and Women’s Hospital, Harvard Medical School, Boston, MA USA

    Papers in Europe PMC
  4. 04
    Pauly K9 papers · 2016

    Stanford University, Stanford, CA USA

    Papers in Europe PMC
  5. 05
    Preusser T9 papers · 2016

    Philips Research, Eindhoven, Netherlands

    Papers in Europe PMC
  6. 06
    Partanen A8 papers · 2016

    Philips, Bethesda, MD USA

    Papers in Europe PMC
  7. 07
    Payne A8 papers · 2016

    University of Utah, Salt Lake City, UT USA

    Papers in Europe PMC
  8. 08
    Xu Z8 papers · 2016

    University of Michigan, Ann Arbor, MI USA

    Papers in Europe PMC
  9. 09
    Frank J7 papers · 2016

    National Institutes of Health Clinical Center, Bethesda, MD USA

    Papers in Europe PMC
  10. 10
    Parker D7 papers · 2016

    University of Utah, Salt Lake City, UT USA

    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 on ClinicalTrials.gov (observational studies and pan-disease registries are listed separately when present). 1 trial are registered for Horner syndrome, the broader category — shown separately because they may or may not enrol this specific subtype.

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.

1 interventional trial matched Horner syndrome, the broader category — listed below. Those studies are not counted in the condition-specific total.

Broader category: Horner syndrome

1

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.

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 0 · after dedupe 0 · already on CT.gov 0 · kept 0 · parent 0 · uncertain 0 · 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).

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 Congenital Horner syndrome — check Associations / patient organisations on that page.

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.

"Congenital Horner syndrome" OR "Congenital Claude-Bernard-Horner syndrome" OR "congenital Horner syndrome (disease)"

Run this search on Europe PMC

MeSH descriptor terms unioned into the query: Horner Syndrome, Congenital

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

"Congenital Horner syndrome" OR "Congenital Claude-Bernard-Horner syndrome" OR "congenital Horner syndrome (disease)" OR "Horner Syndrome, Congenital"

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

Parent-category trials query:

"Horner syndrome"

Query health: suspect — strategies attempted: phrase, mesh; with hits: phrase

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 2026-07-27T04:02:15.400Z