ORPHA:93926
Midline interhemispheric variant of holoprosencephaly
Also known as: MIH · MIH type HPE · MIHF · MIHV · Middle interhemispheric fusion variant · Middle interhemispheric variant of holoprosencephaly · Syntelencephaly
Publications
128
57.8th percentile
Trials
0
Interventional, condition-specific
Researchers
729
Distinct authors in sample
Gene link
—
Readiness
1/6
Stages with a signal
Clinical definition (Orphanet)
Midline interhemispheric variant of holoprosencephaly (MIH) or syntelencephaly is a form of holoprosencephaly (HPE) characterized by non-separation of the posterior frontal and parietal lobes, normally-formed callosal genu and splenium, absence of the callosal body, normally-separated hypothalamus and lentiform nucleus, and frequent heterotopic gray matter.
How rare: How common this is has not been clearly measured.
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.”
1/6 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
128 matched papers (62 in last 10 years) Source
- Phenotype characterisedNot checked
Not yet enriched from Monarch / HPO
- Animal modelNot checked
Not yet enriched from Monarch / Alliance
- Orphan designationNot checked
FDA/EMA orphan-drug designation not enriched yet
- 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)
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?
128
128 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.
128 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).
62 in the last 10 years · medium confidence · 57.8th percentile (publications denominator)
Phrase hits: 128 · MeSH hits: 0
Who's working on it?
729
Distinct author names in 128 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.
- 01Clegg NJ7 papers · 2020
Texas Scottish Rite Hospital for Children, Dallas, TX, USA.
Papers in Europe PMC - 02Muenke M7 papers · 2020
Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA.
Papers in Europe PMC - 03Barkovich AJ5 papers · 2005Papers in Europe PMC
- 04Odent S5 papers · 2018
Faculté de Médecine, Institut de Génétique et Développement de Rennes, UMR 6290, Université de Rennes 1, Rennes, France.
Papers in Europe PMC - 05Roessler E5 papers · 2018
Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA.
Papers in Europe PMC - 06David V4 papers · 2018
Faculté de Médecine, Institut de Génétique et Développement de Rennes, UMR 6290, Université de Rennes 1, Rennes, France.
Papers in Europe PMC - 07Delgado MR4 papers · 2019
Texas Scottish Rite Hospital for Children, Dallas, TX, USA.
Papers in Europe PMC - 08Dubourg C4 papers · 2018
UMR 6061 CNRS, Institut de Génétique et Développement de Rennes, Université de Rennes1, IFR 140 GFAS, Faculté de Médecine, Rennes, 35000, France. christele.dubourg@chu-rennes.fr
Papers in Europe PMC - 09Hahn JS4 papers · 2010
Department of Neurology, Medical Center, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, CA 94305-5235, USA. jhahn@stanford.edu
Papers in Europe PMC - 10Berger SI3 papers · 2020
Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, 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).
Data as of 27 July 2026
No matched interventional trials. This is true for 73% of diseases in the trials denominator (5114 of 7003). Here are the researchers publishing on it.
medium confidence · 36.5th 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.
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 2026-07-26This 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.
"Midline interhemispheric variant of holoprosencephaly" OR "Midline interhemispheric variant of the holoprosencephaly" OR "MIH type HPE" OR "Middle interhemispheric fusion variant" OR "Middle interhemispheric variant of holoprosencephaly" OR "Middle interhemispheric variant of the holoprosencephaly" OR "Syntelencephaly"
ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"Midline interhemispheric variant of holoprosencephaly" OR "Midline interhemispheric variant of the holoprosencephaly" OR "MIH type HPE" OR "Middle interhemispheric fusion variant" OR "Middle interhemispheric variant of holoprosencephaly" OR "Middle interhemispheric variant of the holoprosencephaly" OR "Syntelencephaly"
Study-type breakdown: 0 interventional · 0 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
Synonyms dropped by stoplist: MIH; MIHF; MIHV
Confidence reasoning
- Preferred label is multi-word and distinctive
- 3 synonym(s) dropped by stoplist (may under-count)
- No label/synonym collisions with other diseases in this corpus
Ingested 2026-07-27T04:31:27.846Z