RARE DISEASERESEARCH ATLAS
Open navigation menu

ORPHA:98962

Granular corneal dystrophy type I

low confidenceDisorder

Also known as: Classic GCD · Classic granular corneal dystrophy · Corneal dystrophy Groenouw type I · GCD1 · GCDI · Granular corneal dystrophy type 1

Publications

5,540

Trials

0

Interventional, condition-specific

Researchers

588

Distinct authors in sample

Gene link

TGFBI

Definitive

Readiness

4/6

Stages with a signal

Clinical definition (Orphanet)

Type I granular corneal (GCDI) is a rare form of stromal corneal characterized by multiple small deposits in the superficial central corneal stroma, and visual impairment, which may sometimes be severe.

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 (4)

classic GCD · classic granular corneal dystrophy · corneal dystrophy Groenouw type I · granular corneal dystrophy type 1

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.”

4/6 stages with a signal

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

  1. Gene identifiedPresent

    Definitive — TGFBI

  2. LiteraturePresent

    5,540 matched papers (4,128 in last 10 years) Source

  3. Phenotype characterisedPresent

    15 HPO annotations (e.g. Central corneal dystrophy; Recurrent corneal erosions; Visual impairment) 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; 38 for broader category corneal dystrophy

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 (TGFBI).

GenCC classification: Definitive.

Phenotypes (Monarch / HPO)

15

Associated phenotypes · MONDO:0007377

  • Central corneal dystrophy
  • Recurrent corneal erosions
  • Visual impairment
  • Reduced visual acuity
  • Abnormal corneal epithelium morphology

Showing 5 of 15 — open Monarch for the full list.

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?

5,540

5,540 papers — among the better-studied rare conditions, though still a fraction of common-disease literature (breast cancer: over 700,000). Median papers in the last 10 years for a rare disease in this dataset (publications denominator n=3967) is 59.

5,540 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).

4,128 in the last 10 years · low confidence

Phrase hits: 112 · MeSH hits: 1

Open Europe PMC search

Who's working on it?

588

Distinct author names in 113 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
    Møller HU12 papers · 2024

    Department of Ophthalmology, University Hospital, Arhus, Denmark.

    Papers in Europe PMC
  2. 02
    Kim EK6 papers · 2025

    Department of Ophthalmology, Corneal Dystrophy Research Institute, Yonsei University College of Medicine, Seoul, South Korea.

    Papers in Europe PMC
  3. 03
    Klintworth GK6 papers · 2014

    Department of Pathology, Duke University Medical Center, Durham, North Carolina 27710, USA. klint001@mc.duke.edu

    Papers in Europe PMC
  4. 04
    Enghild JJ4 papers · 2015

    Department of Molecular Biology and Genetics, Science Park, Aarhus University, Aarhus, Denmark 3Interdisciplinary Nanoscience Center (iNANO) and Center for Insoluble Protein Structures (inSPIN), Aarhus University, Aarhus, Denmark.

    Papers in Europe PMC
  5. 05
    Munier FL4 papers · 2024

    Jules-Gonin Eye Hospital, University of Lausanne , Lausanne , Switzerland.

    Papers in Europe PMC
  6. 06
    Aldave AJ3 papers · 2017

    From the Beijing Tongren Eye Center (Song, Sun, N. Wang, Zhang), Beijing Tongren Hospital, Capital Medical University and Beijing Ophthalmology & Visual Sciences Key Laboratory, the Peking University Third Hospital (Y. Chen), Beijing, Key Laboratory of Myopia, Ministry of Health, Department of Ophthalmology (Zhou, Zhao), the Eye and ENT Hospital of Fudan University, Shanghai, the Eye Hospital of Wenzhou Medical University (Q. Wang, S. Chen), Wenzhou, the West China Hospital of Sichuan University (Deng, Qiu), Chengdu, China; the Stein Eye Institute (Aldave), University of California Los Angeles Medical Center, Los Angeles, California, USA.

    Papers in Europe PMC
  7. 07
    Bozkurt B3 papers · 2026

    Selçuk University Faculty of Medicine, Department of Ophtalmology, Konya, Turkey.

    Papers in Europe PMC
  8. 08
    Chao-Shern C3 papers · 2019

    Biomedical Sciences Research Institute, University of Ulster, Coleraine, Northern Ireland, UK.

    Papers in Europe PMC
  9. 09
    Li M3 papers · 2023

    Henan Eye Hospital, Henan Eye Institution, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Zhengzhou, 450003, Henan, China.

    Papers in Europe PMC
  10. 10
    Lisch W3 papers · 2024

    Department of Ophthalmology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany (Dr W. Lisch, Dr Wasielica-Poslednik); the Department of Ophthalmology, Helsinki University Central Hospital, Helsinki, Finland (Dr Kivelä); the Department of Ophthalmology, University of Erlangen-Nürnberg, Erlangen, Germany (Dr Schlötzer-Schrehardt); the Department of Ophthalmology, Eberhard-Karls University of Tübingen, Tübingen, Germany (Dr Rohrbach); the Department of Ophthalmology, University of Marburg, Marburg, Germany (Dr Sekundo); the Department of Ophthalmology, Campus Virchow-Klinikum, Charité Universitaetsmedizin Berlin, Berlin, Germany (Dr Pleyer); the private practice of ophthalmology Hanau, Hanau, Germany (Dr C. Lisch); the Department of Internal Medicine III, Johannes Gutenberg University Mainz, Mainz, Germany (Dr Desuki); the Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Mainz, Mainz, Germany (Dr Rossmann); and the Department of Ophthalmology, Louisiana State University Health Sciences Center, School of Medicine, New Orleans, Louisiana (Dr Weiss).

    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). 38 trials are registered for corneal dystrophy, 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.

low 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.

38 interventional trials matched corneal dystrophy, the broader category — listed below. Those studies are not counted in the condition-specific total.

Broader category: corneal dystrophy

38

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

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 Granular corneal dystrophy type I — 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.

("Granular corneal dystrophy type I" OR "Classic GCD" OR "Classic granular corneal dystrophy" OR "Corneal dystrophy Groenouw type I" OR "Granular corneal dystrophy type 1") OR (MESH:"Groenouw type I corneal dystrophy") OR ("TGFBI" OR "TGFBI syndrome" OR "TGFBI-related")

Run this search on Europe PMC

MeSH descriptor terms unioned into the query: Groenouw type I corneal dystrophy

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

"Granular corneal dystrophy type I" OR "Classic GCD" OR "Classic granular corneal dystrophy" OR "Corneal dystrophy Groenouw type I" OR "Granular corneal dystrophy type 1" OR "Groenouw type I corneal dystrophy"

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

Parent-category trials query:

"corneal dystrophy"

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

Run this search on ClinicalTrials.gov

Synonyms dropped by stoplist: GCD1; GCDI

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
  • Publication count (5540) is extremely high with unknown/missing prevalence — treat as possible over-matching, not proven research intensity

Ingested 2026-07-27T05:48:09.802Z