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ORPHA:628

Diastrophic dysplasia

high confidenceDisorder

Also known as: Diastrophic dwarfism

Publications

1,952

87.2th percentile

Trials

0

Interventional, condition-specific

Researchers

1,110

Distinct authors in sample

Gene link

SLC26A2

Strong

Readiness

4/6

Stages with a signal

Clinical definition (Orphanet)

A rare osteochondrodysplasia characterized by shortened limbs, normal sized head, short stature with short extremities (final adult height is 120cm +/- 20cm), spinal deformities and joint malformations leading to multiple joint contractures (principally involving the shoulders, elbows, interphalangeal joints and hips). The name indicates the ''twisted'' appearance of the spine and limbs in severe forms that is peculiar of this condition.

How rare: 1-9 / 100 000 — about one to nine people per hundred thousand.

Orphanet entry

Cross-references

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

Additional Mondo synonyms (1)

diastrophic dysplasia

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 matched interventional trial, but a gene association and an animal model are on record — often described as translation-ready / stalled at the clinical step.

  1. Gene identifiedPresent

    Strong — SLC26A2

  2. LiteraturePresent

    1,952 matched papers (972 in last 10 years) Source

  3. Phenotype characterisedPresent

    94 HPO annotations (e.g. Abnormal rib morphology; Abnormal clavicle morphology; Bowing of the long bones) Source

  4. Animal modelPresent

    1 genotype model (Mus musculus) Source

  5. Orphan designationNot found

    No FDA or EMA orphan-drug designation matched this disease via UMLS or preferred name Source

  6. 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?

Yes — we know a specific gene responsible (SLC26A2).

GenCC classification: Strong.

Phenotypes (Monarch / HPO)

94

Associated phenotypes · MONDO:0009107

  • Abnormal rib morphology
  • Abnormal clavicle morphology
  • Bowing of the long bones
  • Blue sclerae
  • Hip dysplasia

Showing 5 of 94 — open Monarch for the full list.

Animal models (Monarch / Alliance)

1

Model associations linked to this Mondo ID

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?

1,952

1,952 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.

1,952 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).

972 in the last 10 years · high confidence · 87.2th percentile (publications denominator)

Phrase hits: 932 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

1,110

Distinct author names in 200 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
    Superti-Furga A9 papers · 2026

    Department of Pediatrics, Lausanne University Hospital, University of Lausanne, Lausanne 1011, Switzerland.

    Papers in Europe PMC
  2. 02
    Mäkitie O8 papers · 2025

    Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden; Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden; Folkhälsan Institute of Genetics, Helsinki, Finland.

    Papers in Europe PMC
  3. 03
    Rossi A8 papers · 2026

    Department of Molecular Medicine, Unit of Biochemistry and antrossi@unipv.it.

    Papers in Europe PMC
  4. 04
    Paganini C6 papers · 2023

    Department of Molecular Medicine, Unit of Biochemistry and.

    Papers in Europe PMC
  5. 05
    Raggio C5 papers · 2025

    Department of Orthopedic Surgery, Hospital for Special Surgery, New York, NY, USA.

    Papers in Europe PMC
  6. 06
    Bober MB4 papers · 2023

    Division of Orthogenetics, Nemours/ A.I. duPont Hospital for Children, Wilmington, DE, USA.

    Papers in Europe PMC
  7. 07
    Cormier-Daire V4 papers · 2026

    Université de Paris, INSERM UMR 1163, Institut Imagine, Paris, France.

    Papers in Europe PMC
  8. 08
    Li Y4 papers · 2025

    China Animal Health and Epidemiology Center, Qingdao, Shandong, China.

    Papers in Europe PMC
  9. 09
    Monti L4 papers · 2021

    Department of Molecular Medicine, Unit of Biochemistry and.

    Papers in Europe PMC
  10. 10
    Savarirayan R4 papers · 2021

    Victorian Clinical Genetics Service, Royal Children's Hospital, Melbourne, Victoria, Australia.

    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 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.

See who's working on it — people publishing on this disease are often the practical next contact when no trial is listed.

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 Diastrophic dysplasia — 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.

("Diastrophic dysplasia" OR "Diastrophic dwarfism") OR ("SLC26A2" OR "SLC26A2 syndrome" OR "SLC26A2-related")

Run this search on Europe PMC

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

"Diastrophic dysplasia" OR "Diastrophic dwarfism"

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

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 2026-07-26T14:37:21.878Z