ORPHA:794
Saethre-Chotzen syndrome
Also known as: ACS3 · Acrocephalosyndactyly type 3 · SCS
Publications
896
87.7th percentile
Trials
0
Interventional, condition-specific
Researchers
1,101
Distinct authors in sample
Gene link
FGFR2, TWIST1
Definitive
Readiness
2/6
Stages with a signal
Clinical definition (Orphanet)
A syndrome characterized by unilateral or bilateral coronal synostosis, facial asymmetry, ptosis, strabismus and small ears with prominent superior and/or inferior crus, among other less common manifestations.
How rare: 1-9 / 100 000 — about one to nine people per hundred thousand.
Cross-references
Joined from Mondo / Orphanet. MeSH labels may enter searches; UMLS / OMIM / NCIT are stored for reference.
- MONDO:0007042
- OMIM:101400
- UMLS:C0175699
- NCIT:C75034
Additional Mondo synonyms (4)
Saethre Chotzen Syndrome · Saethre-Chotzen syndrome with or without eyelid anomalies · acrocephalosyndactyly type 3 · type III Acrocephalosyndactyly
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.”
2/6 stages with a signal
No matched interventional trial; the gene is known and literature exists — preclinical or natural-history work may still be the practical next step.
- Gene identifiedPresent
Definitive — FGFR2, TWIST1
- LiteraturePresent
896 matched papers (386 in last 10 years) Source
- Phenotype characterisedNot checked
Not yet enriched from Monarch / HPO
- Animal modelNot checked
Not yet enriched from Monarch / Alliance
- Orphan designationNot checked
FDA/EMA orphan-drug designation not enriched yet
- 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 (FGFR2, TWIST1).
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?
896
896 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.
896 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).
386 in the last 10 years · medium confidence · 87.7th percentile (publications denominator)
Phrase hits: 896 · MeSH hits: 0
Who's working on it?
1,101
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.
- 01Mathijssen IMJ10 papers · 2026
From the Department of Plastic and Reconstructive Surgery and Hand Surgery, Dutch Craniofacial Center.
Papers in Europe PMC - 02Chai Y7 papers · 2026
Center for Craniofacial Molecular Biology, University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA. Electronic address: ychai@usc.edu.
Papers in Europe PMC - 03Crump JG7 papers · 2024
Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of University of Southern California, Los Angeles, CA 90033, USA.
Papers in Europe PMC - 04Maxson RE6 papers · 2024
Department of Biochemistry, Keck School of Medicine, University of Southern California, Los Angeles, United States.
Papers in Europe PMC - 05Choi TM5 papers · 2025
Department of Oral Maxillofacial Surgery, Special Dental Care and Orthodontics, Dutch Craniofacial Center, Erasmus University Medical Center, Wytemaweg 80, 3015 CN, Rotterdam, the Netherlands. t.choi@erasmusmc.nl.
Papers in Europe PMC - 06Farmer DT5 papers · 2024
Department of Stem Cell Biology and Regenerative Medicine, University of Southern California, Los Angeles, United States.
Papers in Europe PMC - 07Teng CS5 papers · 2024
Department of Stem Cell Biology and Regenerative Medicine, University of Southern California, Los Angeles, United States.
Papers in Europe PMC - 08Wolvius EB5 papers · 2025
Department of Oral Maxillofacial Surgery, Special Dental Care and Orthodontics, Dutch Craniofacial Center, Erasmus University Medical Center, Wytemaweg 80, 3015 CN, Rotterdam, the Netherlands.
Papers in Europe PMC - 09Ongkosuwito EM4 papers · 2025
Department of Oral Maxillofacial Surgery, Special Dental Care and Orthodontics, Dutch Craniofacial Center, Erasmus University Medical Center, Wytemaweg 80, 3015 CN, Rotterdam, the Netherlands.
Papers in Europe PMC - 10Yang S4 papers · 2024
From the Department of Plastic and Reconstructive Surgery and Hand Surgery, Dutch Craniofacial Center.
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. 3 observational studies did — shown below because natural-history and cohort work can be an important step toward a trial.
Data as of 27 July 2026
No matched interventional trials. This is true for 73% of diseases in the trials denominator (5114 of 7003). Here are the researchers publishing on it.
medium confidence · 36.5th 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.
Observational and natural-history studies
3 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
- NCT07535372·NOT YET RECRUITING·ASO Treatment for Syndromic Craniosynostoses
Conditions: Craniosynostoses · Crouzon Syndrome · Saethre Chotzen Syndrome · Muenke Syndrome·Matched via name phrase
- NCT04463316·RECRUITING·GROWing Up With Rare GENEtic Syndromes
Conditions: Prader-Willi Syndrome · PWS-like Syndrome · Silver Russel Syndrome · Congenital Hypopituitarism·Matched via name phrase
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 2026-07-26This 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.
"Saethre-Chotzen syndrome" OR "Acrocephalosyndactyly type 3" OR "Saethre Chotzen Syndrome" OR "Saethre-Chotzen syndrome with or without eyelid anomalies" OR "type III Acrocephalosyndactyly"
ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"Saethre-Chotzen syndrome" OR "Acrocephalosyndactyly type 3" OR "Saethre Chotzen Syndrome" OR "Saethre-Chotzen syndrome with or without eyelid anomalies" OR "type III Acrocephalosyndactyly" OR "TWIST1"
Recall-expansion terms: TWIST1
Study-type breakdown: 0 interventional · 3 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: ACS3; SCS
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
Ingested 2026-07-26T15:22:42.105Z