RARE DISEASERESEARCH ATLAS
Open navigation menu

ORPHA:101039

Female restricted epilepsy with intellectual disability

medium confidenceDisorder

Also known as: EFMR · Juberg-Hellman syndrome

Publications

107

62.1th percentile

Trials

2

Interventional, condition-specific

Researchers

1,025

Distinct authors in sample

Gene link

PCDH19

Definitive

Readiness

3/6

Stages with a signal

Orphanet entry

Cross-references

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

Additional Mondo synonyms (12)

DEE9 · EIEE9 · PCDH19 early infantile epileptic encephalopathy · developmental and epileptic encephalopathy 9 · developmental and epileptic encephalopathy, 9 · early infantile epileptic encephalopathy caused by mutation in PCDH19 · early infantile epileptic encephalopathy type 9 · epileptic encephalopathy, early infantile, 9 · epileptic encephalopathy, early infantile, type 9 · familial epilepsy and intellectual disability limited to females · familial epilepsy and mental retardation limited to females · female restricted epilepsy with intellectual disability

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 identifiedPresent

    Definitive — PCDH19

  2. LiteraturePresent

    107 matched papers (78 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

    2 matched on ClinicalTrials.gov

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?

Yes — we know a specific gene responsible (PCDH19).

GenCC classification: Definitive.

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?

107

107 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=5449) is 41.

107 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).

78 in the last 10 years · medium confidence · 62.1th percentile (publications denominator)

Phrase hits: 107 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

1,025

Distinct author names in 107 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
    Berkovic SF24 papers · 2019

    From the Epilepsy Research Centre (D.R.M.V., B.J.S., R.B., M.F.B., S.F.B., M.S.H., I.E.S.), Department of Medicine, University of Melbourne, Austin Health, Australia; Departments of Genetics (D.R.M.V., C.M.A.v.R.-A.) and Neurology (D.R.M.V.), University Medical Center Groningen, University of Groningen, the Netherlands; Pediatric Neurology Unit and Laboratories (D.M., M.M.) and Pediatric Neurology (R.G.), Neurogenetics and Neurobiology Unit and Laboratories, A. Meyer Children's Hospital, University of Florence, Italy; Department of Pediatrics and Pediatric Epilepsy Centre (H.X., W.X.W., Y.J.), Peking University First Hospital, Beijing, China; Department of Pediatrics (C.T.M., H.C.M.), Division of Genetic Medicine, University of Washington, Seattle; Population Health and Immunity Division (M.F.B.), Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia; Department of Medical Biology (M.F.B.), University of Melbourne, Australia; Caulfield (D.W.), Melbourne, Australia; Department of Clinical Genetics (S.M.M.), Academic Medical Centre, Amsterdam, the Netherlands; Department of Clinical Genetics (A.S.B., G.M.S.M., I.M.B.H.v.d.L.), Erasmus University Medical Centre, Rotterdam, the Netherlands; Department of Clinical Genetics (J.M.v.H.), VU University Medical Center, Amsterdam, the Netherlands; Tasmanian Health Service (T.L.W.), Women's and Children's Services, Launceston General Hospital, Tasmania, Australia; TY Nelson Department of Neurology and Neurosurgery (R.I.W.) and Institute of Neuroscience and Muscle Research (R.I.W.), Children's Hospital at Westmead, Sydney, Australia; Department of Neurosciences (S.M.), Lady Cilento Children's Hospital, Brisbane, Australia; Department of Anatomical Pathology (R.M.K.), Austin Hospital, Melbourne, Australia; IRCCS Stella Maris Foundation (F.S., R.G.), Pisa, Italy; Klinikum Oldenburg (G.C.K.), Zentrum für Kinder-und Jugendmedizin, Klinik für Neuropädiatrie u. angeborene Stoffwechselerkrankungen, Oldenburg, Germany; Centre of Epilepsy (Y.J.), Beijing Institute for Brain Disorders, China; Department of Paediatrics (I.E.S.), University of Melbourne, Royal Children's Hospital, Australia; and Florey Institute of Neurosciences and Mental Health (I.E.S.), Parkville, Australia.

    Papers in Europe PMC
  2. 02
    Scheffer IE18 papers · 2019

    From IRCCS Istituto delle Scienze Neurologiche (P.T., F.B., F. Provini, L.V., L.L., B.M., I.N.), Bologna; Department of Biomedical and Neuromotor Sciences (P.T., F.B., F. Provini, L.L.), University of Bologna, Italy; University College London-Institute of Child Health (J.H.C.), Great Ormond Street Hospital for Children NHS Foundation Trust, London and Young Epilepsy, Lingfield, UK; Department of Epidemiology (D.H., R.O.), Mailman School of Public Health, and G.H. Sergievsky Center, College of Physicians & Surgeons, Columbia University, New York, NY; Unité Médicale Epilepsie et Malaises (P.K.), Pôle de Neurologie et Psychiatrie, CHU de Grenoble, France; "C. Munari" Center for Epilepsy Surgery (L.N., L.T.), Niguarda Hospital, Milan, Italy; Epilepsy Research Centre (I.E.S.), Department of Medicine, University of Melbourne, Austin Health, Australia; Department of Neurology (C.B.), University of Bern, Switzerland; Unit of Neurology (F.C.), S. Orsola-Malpighi Hospital, University of Bologna, Italy; Department of Clinical Neurosciences (C.D.), Western General Hospital, Edinburgh, UK; Department of Medical and Surgical Sciences (A.G.), Institute of Neurology, University Magna Græcia, Catanzaro, Italy; Neurology Unit and Laboratories (R.G., C.M.), A. Meyer Children's Hospital, Florence, Italy; National Institute of Clinical Neuroscience (P.H.), Budapest, Hungary; Department of Neurology (M.M.), University of Minnesota Medical School, Minneapolis; Institute of Neurology Mondino (R.M.), University of Pavia; Sleep Disorders Center (L.P.), Department of Neurology, University of Parma, Italy; Department of Neurology (F. Picard), University Hospital and Medical School of Geneva, Switzerland; Department of Biomedical and Surgical Sciences (M.P.), University of Ferrara, Italy; Department of Clinical Neurosciences (P.R.), CHUV, Lausanne, Switzerland; Functional Neurology and Epileptology (P.R.), Hospices Civils de Lyon and CRNL, Lyon; Epilepsy Institute (P.R.), IDEE, Lyon, France

    Papers in Europe PMC
  3. 03
    Bassani S9 papers · 2025

    Institute of Neuroscience, CNR, 20854 Vedano al Lambro, Italy; NeuroMI Milan Center for Neuroscience, University of Milano-Bicocca, 20126 Milano, Italy. Electronic address: silvia.bassani@in.cnr.it.

    Papers in Europe PMC
  4. 04
    Mefford HC9 papers · 2019

    From the Epilepsy Research Centre (D.R.M.V., B.J.S., R.B., M.F.B., S.F.B., M.S.H., I.E.S.), Department of Medicine, University of Melbourne, Austin Health, Australia; Departments of Genetics (D.R.M.V., C.M.A.v.R.-A.) and Neurology (D.R.M.V.), University Medical Center Groningen, University of Groningen, the Netherlands; Pediatric Neurology Unit and Laboratories (D.M., M.M.) and Pediatric Neurology (R.G.), Neurogenetics and Neurobiology Unit and Laboratories, A. Meyer Children's Hospital, University of Florence, Italy; Department of Pediatrics and Pediatric Epilepsy Centre (H.X., W.X.W., Y.J.), Peking University First Hospital, Beijing, China; Department of Pediatrics (C.T.M., H.C.M.), Division of Genetic Medicine, University of Washington, Seattle; Population Health and Immunity Division (M.F.B.), Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia; Department of Medical Biology (M.F.B.), University of Melbourne, Australia; Caulfield (D.W.), Melbourne, Australia; Department of Clinical Genetics (S.M.M.), Academic Medical Centre, Amsterdam, the Netherlands; Department of Clinical Genetics (A.S.B., G.M.S.M., I.M.B.H.v.d.L.), Erasmus University Medical Centre, Rotterdam, the Netherlands; Department of Clinical Genetics (J.M.v.H.), VU University Medical Center, Amsterdam, the Netherlands; Tasmanian Health Service (T.L.W.), Women's and Children's Services, Launceston General Hospital, Tasmania, Australia; TY Nelson Department of Neurology and Neurosurgery (R.I.W.) and Institute of Neuroscience and Muscle Research (R.I.W.), Children's Hospital at Westmead, Sydney, Australia; Department of Neurosciences (S.M.), Lady Cilento Children's Hospital, Brisbane, Australia; Department of Anatomical Pathology (R.M.K.), Austin Hospital, Melbourne, Australia; IRCCS Stella Maris Foundation (F.S., R.G.), Pisa, Italy; Klinikum Oldenburg (G.C.K.), Zentrum für Kinder-und Jugendmedizin, Klinik für Neuropädiatrie u. angeborene Stoffwechselerkrankungen, Oldenburg, Germany; Centre of Epilepsy (Y.J.), Beijing Institute for Brain Disorders, China; Department of Paediatrics (I.E.S.), University of Melbourne, Royal Children's Hospital, Australia; and Florey Institute of Neurosciences and Mental Health (I.E.S.), Parkville, Australia.

    Papers in Europe PMC
  5. 05
    Passafaro M7 papers · 2024

    Institute of Neuroscience, CNR, 20854 Vedano al Lambro, Italy; NeuroMI Milan Center for Neuroscience, University of Milano-Bicocca, 20126 Milano, Italy.

    Papers in Europe PMC
  6. 06
    Carvill GL6 papers · 2016

    From the Division of Genetic Medicine, Department of Pediatrics (G.L.C., C.H., J.C., E.G., H.C.M.), and the Department of Genome Sciences (J.S.), University of Washington, Seattle; Neurogenetics Group (S.W.), Department of Molecular Genetics, VIB, Antwerp; Laboratory of Neurogenetics (S.W., A.S., P.D.J.), Institute Born-Bunge, University of Antwerp, Belgium; Epilepsy Centre Kempenhaeghe (S.W.), Oosterhout, the Netherlands; Epilepsy Research Centre (J.M.M., S.F.B., I.E.S.), Department of Medicine, University of Melbourne, Austin Health, Australia; Department of Neuropediatrics (C.H., H.M., S.v.S., I.H.), University Medical Center, Schleswig-Holstein, Christian-Albrechts University, Kiel, Germany; Danish Epilepsy Centre (R.S.M., H.H., M.N.), Dianalund; Institute for Regional Health Services (H.H., M.N.), University of Southern Denmark, Odense, Denmark; Department of Molecular and Medical Genetics (B.J.O.), Oregon Health and Science University, Portland; Florey Institute (S.P., A.C., E.V.G., I.E.S.), Victoria; TY Nelson Department of Neurology (D.G.), The Children's Hospital at Westmead, Sydney, NSW, Australia; Department of Paediatrics (L.G.S.), School of Medicine and Health Sciences, University of Otago, Wellington, New Zealand; Epilepsy Research Program (B.L.H., L.M.D.), School of Pharmacy and Medical Sciences, University of South Australia, Adelaide; Division of Neurology (P.D.J.), Antwerp University Hospital, Belgium; and the Department of Paediatrics (I.E.S.), University of Melbourne, Royal Children's Hospital, Australia.

    Papers in Europe PMC
  7. 07
    Dibbens LM6 papers · 2016

    From the Epilepsy Research Centre, Department of Medicine (Neurology) (L.V., K.L., J.E., D.K., M.C., Y.T.-B., R.A.H., I.E.S., S.F.B.), University of Melbourne, Austin Health; School of Medicine (L.V.), The University of Queensland, Brisbane; Department of Neurology (L.V.), Royal Brisbane and Women's Hospital; Centre for Molecular, Environmental, Analytic and Genetic Epidemiology (R.L.M., J.L.H.), University of Melbourne; School of Pharmacy and Medical Sciences and Sansom Institute for Health Research (S.E.H., L.M.D.), University of South Australia, Adelaide; and the Department of Genetic Medicine, SA Pathology (J.C.M.), Women's and Children's Hospital, North Adelaide, Australia.

    Papers in Europe PMC
  8. 08
    Mazzoleni S6 papers · 2025

    Institute of Neuroscience, CNR, 20854 Vedano al Lambro, Italy; Department of Medical Biotechnology and Translational Medicine, University of Milan, 20129 Milano, Italy.

    Papers in Europe PMC
  9. 09
    Petrou S6 papers · 2019

    From the Epilepsy Research Centre (M.S.H., B.M.R., J.A.D., S.A.M., M.R.N., I.E.S., S.F.B.), Department of Medicine, University of Melbourne, Austin Health, Melbourne, Victoria, Australia; Division of Genetic Medicine (C.T.M., G.L.C., H.C.M.), Department of Pediatrics, University of Washington, Seattle, WA; Florey Institute for Neuroscience and Mental Health (U.N., E.V.G., C.J.M., C.A.R., S.P., I.E.S.), University of Melbourne, Melbourne, Victoria, Australia; Department of Neurology (I.E.S.), Royal Children's Hospital, Parkville, Melbourne, Victoria, Australia; and Department of Pediatrics (I.E.S.), University of Melbourne, Royal Children's Hospital, Melbourne, Victoria, Australia.

    Papers in Europe PMC
  10. 10
    Hildebrand MS5 papers · 2019

    From the Epilepsy Research Centre (D.R.M.V., B.J.S., R.B., M.F.B., S.F.B., M.S.H., I.E.S.), Department of Medicine, University of Melbourne, Austin Health, Australia; Departments of Genetics (D.R.M.V., C.M.A.v.R.-A.) and Neurology (D.R.M.V.), University Medical Center Groningen, University of Groningen, the Netherlands; Pediatric Neurology Unit and Laboratories (D.M., M.M.) and Pediatric Neurology (R.G.), Neurogenetics and Neurobiology Unit and Laboratories, A. Meyer Children's Hospital, University of Florence, Italy; Department of Pediatrics and Pediatric Epilepsy Centre (H.X., W.X.W., Y.J.), Peking University First Hospital, Beijing, China; Department of Pediatrics (C.T.M., H.C.M.), Division of Genetic Medicine, University of Washington, Seattle; Population Health and Immunity Division (M.F.B.), Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia; Department of Medical Biology (M.F.B.), University of Melbourne, Australia; Caulfield (D.W.), Melbourne, Australia; Department of Clinical Genetics (S.M.M.), Academic Medical Centre, Amsterdam, the Netherlands; Department of Clinical Genetics (A.S.B., G.M.S.M., I.M.B.H.v.d.L.), Erasmus University Medical Centre, Rotterdam, the Netherlands; Department of Clinical Genetics (J.M.v.H.), VU University Medical Center, Amsterdam, the Netherlands; Tasmanian Health Service (T.L.W.), Women's and Children's Services, Launceston General Hospital, Tasmania, Australia; TY Nelson Department of Neurology and Neurosurgery (R.I.W.) and Institute of Neuroscience and Muscle Research (R.I.W.), Children's Hospital at Westmead, Sydney, Australia; Department of Neurosciences (S.M.), Lady Cilento Children's Hospital, Brisbane, Australia; Department of Anatomical Pathology (R.M.K.), Austin Hospital, Melbourne, Australia; IRCCS Stella Maris Foundation (F.S., R.G.), Pisa, Italy; Klinikum Oldenburg (G.C.K.), Zentrum für Kinder-und Jugendmedizin, Klinik für Neuropädiatrie u. angeborene Stoffwechselerkrankungen, Oldenburg, Germany; Centre of Epilepsy (Y.J.), Beijing Institute for Brain Disorders, China; Department of Paediatrics (I.E.S.), University of Melbourne, Royal Children's Hospital, Australia; and Florey Institute of Neurosciences and Mental Health (I.E.S.), Parkville, Australia.

    Papers in Europe PMC

Clinical research

Is a treatment being tested?

2

interventional trials for this specific condition

2 interventional trials matched this specific condition name; none in our sample are currently recruiting.

Data as of 27 July 2026

2 interventional trials — more than 73% of diseases in the trials denominator have none at all (5114 of 7003; this disease is at the 82.4th percentile).

medium confidence · 82.4th percentile (trials denominator)

Recruiting interventional trials

From the matched ClinicalTrials.gov set

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

No currently recruiting studies in the matched set. Open the same 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.

"Female restricted epilepsy with intellectual disability" OR "Juberg-Hellman syndrome" OR "EIEE9" OR "PCDH19 early infantile epileptic encephalopathy" OR "developmental and epileptic encephalopathy 9" OR "developmental and epileptic encephalopathy, 9" OR "early infantile epileptic encephalopathy caused by mutation in PCDH19" OR "early infantile epileptic encephalopathy type 9" OR "epileptic encephalopathy, early infantile, 9" OR "epileptic encephalopathy, early infantile, type 9" OR "familial epilepsy and intellectual disability limited to females" OR "familial epilepsy and mental retardation limited to females"

Run this search on Europe PMC

MeSH descriptor terms unioned into the query: Epilepsy, Female-Restricted, with Mental Retardation

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

"Female restricted epilepsy with intellectual disability" OR "Juberg-Hellman syndrome" OR "EIEE9" OR "PCDH19 early infantile epileptic encephalopathy" OR "developmental and epileptic encephalopathy 9" OR "developmental and epileptic encephalopathy, 9" OR "early infantile epileptic encephalopathy caused by mutation in PCDH19" OR "early infantile epileptic encephalopathy type 9" OR "epileptic encephalopathy, early infantile, 9" OR "epileptic encephalopathy, early infantile, type 9" OR "familial epilepsy and intellectual disability limited to females" OR "familial epilepsy and mental retardation limited to females" OR "Epilepsy, Female-Restricted, with Mental Retardation" OR "PCDH19"

Recall-expansion terms: PCDH19

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

Study-type breakdown: 2 interventional · 0 observational · 0 expanded access. Only interventional studies enter the trial headline.

Query health: ok — strategies attempted: phrase, mesh, recall-expansion; with hits: phrase, recall-expansion

Run this search on ClinicalTrials.gov

Synonyms dropped by stoplist: EFMR; DEE9

Confidence reasoning

  • Preferred label is multi-word and distinctive
  • 2 synonym(s) dropped by stoplist (may under-count)
  • No label/synonym collisions with other diseases in this corpus

Ingested 2026-07-27T07:13:59.746Z