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ORPHA:83465

Narcolepsy type 2

high confidenceDisorder

Also known as: Narcolepsy without cataplexy

Publications

798

84.3th percentile

Trials

21

Interventional, condition-specific

Researchers

898

Distinct authors in sample

Gene link

—

Readiness

3/6

Stages with a signal

Clinical definition (Orphanet)

A rare neurologic disease characterized by excessive daytime sleepiness associated with uncontrollable sleep urges and sometimes sleep paralysis, and hypnagogic/hypnopompic hallucinations.

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 (1)

narcolepsy type 2

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

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

    798 matched papers (565 in last 10 years) Source

  3. Phenotype characterisedPresent

    5 HPO annotations (e.g. Atypical behavior; Hallucinations; Excessive daytime somnolence) 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 trialPresent

    21 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)

5

Associated phenotypes · MONDO:0019371

  • Atypical behavior
  • Hallucinations
  • Excessive daytime somnolence
  • Sleep disturbance
  • Insomnia

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

2

Drugs / clinical candidates · MONDO_0019371

CTD chemicals (MyDisease.info)

No CTD chemical associations returned for this Mondo ID.

Literature

Is anyone studying this?

798

798 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=3967) is 59.

798 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).

565 in the last 10 years · high confidence · 84.3th percentile (publications denominator)

Phrase hits: 798 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

898

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
    Dauvilliers Y23 papers · 2026

    National Reference Network for Orphan Diseases (Narcolepsy), Department of Neurology, Hôpital Gui de Chauliac, CHU Montpellier, INSERM U1061, France.

    Papers in Europe PMC
  2. 02
    Plazzi G16 papers · 2026

    Department of Biomedical and Neuromotor Neurological Sciences, University of Bologna, and IRCCS Istituto delle Scienze Neurologiche, Bologna, Italy.

    Papers in Europe PMC
  3. 03
    Barateau L15 papers · 2026

    Sleep-Wake Disorders Unit, Department of Neurology, Gui-de-Chauliac University Hospital, Montpellier, France.

    Papers in Europe PMC
  4. 04
    Pizza F13 papers · 2026

    IRCCS Istituto delle Scienze Neurologiche di Bologna, 40139 Bologna, Italy.

    Papers in Europe PMC
  5. 05
    Fronczek R12 papers · 2026

    Stichting Epilepsie Instellingen Nederland (SEIN), Sleep-Wake Center, Heemstede, Netherlands; Department of Neurology, Leiden University Medical Centre, Leiden, Netherlands.

    Papers in Europe PMC
  6. 06
    Lammers GJ12 papers · 2025

    Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands.

    Papers in Europe PMC
  7. 07
    Mignot E11 papers · 2026

    Stanford Center for Sleep Sciences, Stanford University, Stanford, CA.

    Papers in Europe PMC
  8. 08
    Morse AM9 papers · 2026

    Geisinger Commonwealth School of Medicine, Geisinger Medical Center, Janet Weis Children's Hospital, Danville, PA, USA.

    Papers in Europe PMC
  9. 09
    Trotti LM9 papers · 2025

    Department of Neurology, Emory University School of Medicine, USA; Sleep Center, Emory Healthcare, Atlanta, GA, USA. Electronic address: Lbecke2@emory.edu.

    Papers in Europe PMC
  10. 10
    Biscarini F7 papers · 2026

    Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, Italy.

    Papers in Europe PMC

Clinical research

Is a treatment being tested?

21

interventional trials for this specific condition

21 interventional trials matched this specific condition name; 9 currently recruiting in our sample. 104 trials are registered for narcolepsy, the broader category — shown separately because they may or may not enrol this specific subtype.

Data as of 11 September 2026

21 interventional trials — more than 77.2% of diseases in the trials denominator have none at all (5501 of 7126; this disease is at the 95th percentile).

high confidence · 95th percentile (trials denominator)

Recruiting interventional trials

From the matched ClinicalTrials.gov set

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

Broader category: narcolepsy

104

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

2 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

General rare disease registries you may be eligible for

These studies enroll across many rare conditions. They are not counted as evidence that anyone is studying this specific disease.

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 26 · after dedupe 26 · already on CT.gov 0 · kept 0 · parent 0 · uncertain 26 · 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 (26)

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 Narcolepsy type 2 — 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.

"Narcolepsy type 2" OR "Narcolepsy without cataplexy"

Run this search on Europe PMC

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

"Narcolepsy type 2" OR "Narcolepsy without cataplexy"

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: 21 interventional · 2 observational · 1 expanded access. Only interventional studies enter the trial headline.

Parent-category trials query:

"narcolepsy"

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 2026-07-27T02:36:59.416Z