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ORPHA:40

Acromesomelic dysplasia, Maroteaux type

low confidenceDisorder

Publications

3,496

Trials

0

Interventional, condition-specific

Researchers

1,116

Distinct authors in sample

Gene link

NPR2

Definitive

Readiness

4/6

Stages with a signal

Clinical definition (Orphanet)

A rare acromesomelic characterized by severe dwarfism (adult height <120 cm), both axial and appendicular involvement (shortening of the middle and distal segments of limbs and vertebral shortening), and with normal facial appearance and intelligence. It is a less severe form than acromesomelic , Grebe type and acromesomelic , Hunter-Thomson type .

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 (2)

acromesomelic dysplasia 1, Maroteaux type · acromesomelic dysplasia, Maroteaux type

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

    Definitive — NPR2

  2. LiteraturePresent

    3,496 matched papers (2,266 in last 10 years) Source

  3. Phenotype characterisedPresent

    48 HPO annotations (e.g. Broad phalanx; Broad metacarpals; Cone-shaped epiphyses of the phalanges of the hand) Source

  4. Animal modelPresent

    2 genotype models (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 (NPR2).

GenCC classification: Definitive.

Phenotypes (Monarch / HPO)

48

Associated phenotypes · MONDO:0011275

  • Broad phalanx
  • Broad metacarpals
  • Cone-shaped epiphyses of the phalanges of the hand
  • Prominent forehead
  • Disproportionate short-limb short stature

Showing 5 of 48 — open Monarch for the full list.

Animal models (Monarch / Alliance)

2

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?

3,496

3,496 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.

3,496 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).

2,266 in the last 10 years · low confidence

Phrase hits: 84 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

1,116

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
    Chen S4 papers · 2025

    Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China.

    Papers in Europe PMC
  2. 02
    Egbert JR4 papers · 2025

    Department of Cell Biology, University of Connecticut Health Center, Farmington, CT, USA.

    Papers in Europe PMC
  3. 03
    Jaffe LA4 papers · 2025

    Department of Cell Biology, University of Connecticut Health Center, Farmington, CT, USA.

    Papers in Europe PMC
  4. 04
    Li Y4 papers · 2026

    Shanghai University of Medicine and Health Sciences Affiliated Zhoupu Hospital, No. 1500 Zhouyuan Road, Pudong New Area, Shanghai, 201318, China. liyf@sumhs.edu.cn.

    Papers in Europe PMC
  5. 05
    Sugawara N4 papers · 2026

    Department of Psychiatry, Dokkyo Medical University School of Medicine, Mibu, Japan.

    Papers in Europe PMC
  6. 06
    Yamada K4 papers · 2026

    Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan.

    Papers in Europe PMC
  7. 07
    Yang X4 papers · 2026

    Shanghai University of Medicine and Health Sciences Affiliated Zhoupu Hospital, No. 1500 Zhouyuan Road, Pudong New Area, Shanghai, 201318, China.

    Papers in Europe PMC
  8. 08
    Yasui-Furukori N4 papers · 2026

    Department of Psychiatry, Dokkyo Medical University School of Medicine, Mibu, Japan.

    Papers in Europe PMC
  9. 09
    Zhang M4 papers · 2025

    Department of Endocrinology, Genetics and Metabolism, Affiliated Hospital of Jining Medical University, Jining Medical University, 89 Guhuai Road, Jining, 272029, Shandong, People's Republic of China.

    Papers in Europe PMC
  10. 10
    Zhang Y4 papers · 2026

    State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and Technology, Guangxi University, Nanning 530004, China.

    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.

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.

Broader category acromesomelic dysplasia also has no matched interventional trial. See who's working on it — people publishing on this disease are often the practical next contact when no trial is listed.

Broader category: acromesomelic dysplasia

0

Interventional trials for the parent category, exclusive of NCT IDs already counted above. Eligibility for this subtype is not guaranteed.

Parent-category matching found a broader label but no interventional trials under it. How we count trials.

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 Acromesomelic dysplasia, Maroteaux type — 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.

("Acromesomelic dysplasia, Maroteaux type" OR "acromesomelic dysplasia 1, Maroteaux type") OR ("NPR2" OR "NPR2 syndrome" OR "NPR2-related")

Run this search on Europe PMC

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

"Acromesomelic dysplasia, Maroteaux type" OR "acromesomelic dysplasia 1, Maroteaux type"

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

Parent-category trials query:

"acromesomelic dysplasia"

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
  • Publication count (3496) is implausibly high for prevalence class "<1 / 1 000 000" — treat as possible over-matching, not a measure of research intensity

Ingested 2026-07-26T12:11:51.029Z