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ORPHA:2325

Epidermolysis bullosa simplex with anodontia/hypodontia

high confidenceDisorder

Also known as: EBS with anodontia/hypodontia · Kallin syndrome

Publications

4

8th percentile

Trials

0

Interventional, condition-specific

Researchers

18

Distinct authors in sample

Gene link

—

Readiness

3/6

Stages with a signal

Clinical definition (Orphanet)

A rare epidermolysis bullosa simplex characterized by the association of the typical trauma-induced blisters with additional features including hearing impairment, alopecia, hypo- or anodontia, and nail . Occurrence of vitiliginous skin areas unrelated to the sites of the blisters has also been described.

How rare: <1 / 1 000 000 — fewer than one in a million. In a city the size of Kolkata, that might mean on the order of fifteen people.

Orphanet entry

Cross-references

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

Additional Mondo synonyms (1)

Gamborg-Nielsen syndrome

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

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

  1. Gene identifiedNot found

    No GenCC disease–gene assertion in this build

  2. LiteraturePresent

    4 matched papers (1 in last 10 years) Source

  3. Phenotype characterisedPresent

    19 HPO annotations (e.g. Abnormality of the face; Mandibular prognathia; Short philtrum) 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; 18 for broader category epidermolysis bullosa simplex

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)

19

Associated phenotypes · MONDO:0016514

  • Abnormality of the face
  • Mandibular prognathia
  • Short philtrum
  • Hearing impairment
  • Myopia

Showing 5 of 19 — 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?

4

4 papers have ever been indexed 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=3967) is 59.

4 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).

1 in the last 10 years · high confidence · 8th percentile (publications denominator)

Phrase hits: 4 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

18

Distinct author names in 4 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
    Abdel Hay RM1 paper · 2015
    Papers in Europe PMC
  2. 02
    Abou Chedid JC1 paper · 2019

    Department of Pediatric Dentistry, Faculty of Dental Medicine, Saint-Joseph University, Beirut, Lebanon.

    Papers in Europe PMC
  3. 03
    Biraggari SK1 paper · 2015

    G Pulla Reddy Dental College & Hospital, India.

    Papers in Europe PMC
  4. 04
    Bugude SS1 paper · 2015

    G Pulla Reddy Dental College & Hospital, India.

    Papers in Europe PMC
  5. 05
    El Darouti MA1 paper · 2015

    Department of Dermatology, Faculty of Medicine, Cairo University, Cairo, Egypt.

    Papers in Europe PMC
  6. 06
    El Hawary MS1 paper · 2015
    Papers in Europe PMC
  7. 07
    El-Outa A1 paper · 2019

    Private Practice of Oral Medicine and Restorative Dentistry, Beirut, Lebanon.

    Papers in Europe PMC
  8. 08
    Gedde-Dahl T Jr1 paper · 1996
    Papers in Europe PMC
  9. 09
    Hakeem MA1 paper · 2015

    G Pulla Reddy Dental College & Hospital, India.

    Papers in Europe PMC
  10. 10
    Lyngstadaas SP1 paper · 1996

    Laboratory for Molecular Biology, Department of Oral Pathology, Faculty of Dentistry, University of Oslo, Norway.

    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). 18 trials are registered for epidermolysis bullosa simplex, 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.

high 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.

18 interventional trials matched epidermolysis bullosa simplex, the broader category — listed below. Those studies are not counted in the condition-specific total.

Broader category: epidermolysis bullosa simplex

18

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 2026-07-29

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 Epidermolysis bullosa simplex with anodontia/hypodontia — 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.

"Epidermolysis bullosa simplex with anodontia/hypodontia" OR "EBS with anodontia/hypodontia" OR "Kallin syndrome" OR "Gamborg-Nielsen syndrome"

Run this search on Europe PMC

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

"Epidermolysis bullosa simplex with anodontia/hypodontia" OR "EBS with anodontia/hypodontia" OR "Kallin syndrome" OR "Gamborg-Nielsen syndrome"

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

Parent-category trials query:

"epidermolysis bullosa simplex"

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 2026-07-26T19:51:55.517Z