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ORPHA:443070

Hemicrania continua

high confidenceDisorder

Publications

898

87.5th percentile

Trials

3

Interventional, condition-specific

Researchers

764

Distinct authors in sample

Gene link

—

Readiness

2/6

Stages with a signal

Clinical definition (Orphanet)

A rare trigeminal autonomic cephalalgia characterized by indomethacin-sensitive, persistent, strictly unilateral headache lasting for more than three months, associated with ipsilateral conjunctival injection, lacrimation, nasal congestion, rhinorrhea, forehead and facial sweating, miosis, ptosis, eyelid edema, and/or restlessness or agitation, and not better accounted for by another type of headache. Migrainous symptoms such as photophobia are often observed. The headache may be continuous (unremitting subtype) or interrupted by remission periods of more than 24 hours (remitting subtype).

Orphanet entry

Cross-references

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

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

    898 matched papers (376 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

    3 matched on ClinicalTrials.gov (1 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?

898

898 papers have been published on this condition. That is a real research literature — still far smaller than common diseases (breast cancer: over 700,000 papers). Median papers in the last 10 years for a rare disease in this dataset (publications denominator n=5449) is 41.

898 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).

376 in the last 10 years · high confidence · 87.5th percentile (publications denominator)

Phrase hits: 898 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

764

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
    Goadsby PJ12 papers · 2025

    Headache Group, Department of Basic and Clinical Neuroscience, King's College London, London, UK. peter.goadsby@kcl.ac.uk.

    Papers in Europe PMC
  2. 02
    Prakash S6 papers · 2024

    Department of Neurolgy, Smt BK Shah Medical Institute and Research Centre, Vadodara, India.

    Papers in Europe PMC
  3. 03
    Togha M6 papers · 2026

    Department of Neurology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.

    Papers in Europe PMC
  4. 04
    Zhang P5 papers · 2026

    Department of Neurology, Rutgers Robert University Medical School, New Brunswick, NJ, United States.

    Papers in Europe PMC
  5. 05
    Ashina S4 papers · 2026

    Department of Anesthesiology, Critical Care, and Pain Medicine, Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, MA, USA.

    Papers in Europe PMC
  6. 06
    Matharu M4 papers · 2025

    Headache Group, Institute of Neurology and The National Hospital for Neurology and Neurosurgery, Queen Square, London, UK.

    Papers in Europe PMC
  7. 07
    Zhang X4 papers · 2026

    Department of Neurology, People's Hospital, Peking University, Beijing, 100044, China.

    Papers in Europe PMC
  8. 08
    Andreou AP3 papers · 2023

    Department of Functional Neurosurgery and Neuromodulation, Romodanov Neurosurgery Institute, National Academy of Medical Sciences of Ukraine, Kyiv, Ukraine; The Headache Service, Guy's and St Thomas' NHS Foundation Trust, London, UK.

    Papers in Europe PMC
  9. 09
    Burish M3 papers · 2025

    Department of Neurosurgery, University of Texas Health Science Center at Houston, Houston, USA.

    Papers in Europe PMC
  10. 10
    Burish MJ3 papers · 2023

    Department of Neurosurgery, University of Texas Health Science Center at Houston, Will Erwin Headache Research Center, 6400 Fannin Street, Suite 2010, Houston, TX 77030, USA. Electronic address: Mark.j.burish@uth.tmc.edu.

    Papers in Europe PMC

Clinical research

Is a treatment being tested?

3

interventional trials for this specific condition

3 interventional trials matched this specific condition name; 1 currently recruiting in our sample.

Data as of 27 July 2026

3 interventional trials — more than 73% of diseases in the trials denominator have none at all (5114 of 7003; this disease is at the 85.1th percentile).

high confidence · 85.1th percentile (trials denominator)

Recruiting interventional trials

From the matched ClinicalTrials.gov set

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

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

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.

"Hemicrania continua"

Run this search on Europe PMC

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

"Hemicrania continua"

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: 3 interventional · 1 observational · 0 expanded access. Only interventional studies enter the trial headline.

Query health: ok — strategies attempted: phrase; 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 2026-07-27T16:23:55.672Z