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ORPHA:1465

Coffin-Siris syndrome

low confidenceDisorder

Also known as: CSS

Publications

1,222

Trials

31

Interventional, condition-specific

Researchers

1,464

Distinct authors in sample

Gene link

ARID1A, ARID1B, ARID2

Definitive

Readiness

3/6

Stages with a signal

Clinical definition (Orphanet)

A rare genetic syndromic of broad phenotypic range characterized by and variable clinical features which most commonly, but not consistently, include aplasia or hypoplasia of the distal phalanx or nail of the fifth digit, and coarse facial features.

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.

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

An interventional trial matched this condition name on ClinicalTrials.gov — see trials below.

  1. Gene identifiedPresent

    Definitive — ARID1A, ARID1B, ARID2, BICRA, DPF2…

  2. LiteraturePresent

    1,222 matched papers (981 in last 10 years) Source

  3. Phenotype characterisedNot checked

    Not yet enriched from Monarch / HPO

  4. Animal modelNot checked

    Not yet enriched from Monarch / Alliance

  5. Orphan designationNot checked

    FDA/EMA orphan-drug designation not enriched yet

  6. Interventional trialPresent

    31 matched on ClinicalTrials.gov (13 recruiting in sample)

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 (ARID1A, ARID1B, ARID2…).

GenCC classification: Definitive.

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?

1,222

1,222 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=5449) is 41.

1,222 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).

981 in the last 10 years · low confidence

Phrase hits: 1,222 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

1,464

Distinct author names in 200 sampled papers — named people below.

Who's working on it?

People publishing on this condition (sampled Europe PMC records). Affiliation is the most recent found in that sample.

  1. 01
    Sadikovic B10 papers · 2026

    Verspeeten Clinical Genome Centre, London Health Sciences Centre, London, ON, Canada; Department of Pathology and Laboratory Medicine, Western University, London, ON, Canada.

    Papers in Europe PMC
  2. 02
    Santen GWE8 papers · 2026

    Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands. Electronic address: santen@lumc.nl.

    Papers in Europe PMC
  3. 03
    Wang Y8 papers · 2026

    Center of Molecular Medicine, Pediatrics Research Institute, Children's Hospital of Fudan University, National Children's Medical Center, 399 Wanyuan Road, Shanghai, 201102, China.

    Papers in Europe PMC
  4. 04
    Li Y7 papers · 2026

    Department of Neurology and Rehabilitation, Qingdao Women and Children's Hospital, Qingdao University. No. 6 Tongfu Road, Qingdao, Shandong, 266034, China.

    Papers in Europe PMC
  5. 05
    Kerkhof J6 papers · 2026

    Verspeeten Clinical Genome Centre, London Health Sciences Centre, London, ON, Canada.

    Papers in Europe PMC
  6. 06
    Li H6 papers · 2026

    Ningxia Eye Hospital, People's Hospital of Ningxia Hui Autonomous Region, Third Clinical Medical College of Ningxia Medical University, Yinchuan, China.

    Papers in Europe PMC
  7. 07
    van der Sluijs PJ5 papers · 2026

    Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands.

    Papers in Europe PMC
  8. 08
    Zhou Y5 papers · 2026

    Neurology Department, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, 201102, China.

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

    Department of Human Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.

    Papers in Europe PMC
  10. 10
    Chen J4 papers · 2026

    Department of Respiratory Medicine, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China.

    Papers in Europe PMC

Clinical research

Is a treatment being tested?

31

interventional trials for this specific condition

31 interventional trials matched this specific condition name; 13 currently recruiting in our sample.

Data as of 27 July 2026

31 interventional trials — more than 73% of diseases in the trials denominator have none at all (5114 of 7003; this disease is at the 95.8th percentile).

low confidence · 95.8th percentile (trials denominator)

Recruiting interventional trials

From the matched ClinicalTrials.gov set

31 interventional trials matched after quoted-phrase search and title/condition post-filter.

Observational and natural-history studies

4 observational studies match this condition. These do not test a treatment and are not counted in the interventional-trial headline, but they are genuine research: natural-history work often defines the endpoints needed for a future rare-disease trial, and families may be able to enroll.

Recruiting or not-yet-recruiting

Open the complete matched search on ClinicalTrials.gov

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 2026-07-26

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.

"Coffin-Siris syndrome"

Run this search on Europe PMC

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

"Coffin-Siris syndrome" OR "ARID1A" OR "ARID1B" OR "ARID2" OR "BICRA" OR "DPF2" OR "SMARCA4" OR "SMARCB1" OR "SMARCC2" OR "SMARCE1"

Recall-expansion terms: ARID1A, ARID1B, ARID2, BICRA, DPF2, SMARCA4, SMARCB1, SMARCC2, SMARCE1

Interventional trials matched via: phrase (mesh = registered under a MeSH descriptor no name phrase would catch; recall-expansion = gene / selected parent terms used only for trials).

Study-type breakdown: 31 interventional · 4 observational · 0 expanded access. Only interventional studies enter the trial headline.

Query health: ok — strategies attempted: phrase, recall-expansion; with hits: phrase, recall-expansion

Run this search on ClinicalTrials.gov

Synonyms dropped by stoplist: CSS

Confidence reasoning

  • Preferred label is multi-word and distinctive
  • 1 synonym(s) dropped by stoplist (may under-count)
  • No label/synonym collisions with other diseases in this corpus
  • Publication count (1222) is implausibly high for prevalence class "<1 / 1 000 000" — treat as possible over-matching, not a measure of research intensity

Ingested 2026-07-26T17:28:31.846Z