Cornelia de Lange syndrome 3
Findings
No curated finding names Cornelia de Lange syndrome 3 yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Any Cornelia de Lange syndrome in which the cause of the disease is a mutation in the SMC3 gene.
Definition from the Mondo Disease Ontology (MONDO:0012555), read 2026-09-29. CC BY 4.0.
- Inheritance
- Autosomal dominant inheritance
- Onset and course
- Infantile onset · Childhood onset
HPO, annotations 2026-09-02
Features
76 features
What the disease is reported to present with, and how often among people who have it — never how often a feature means the disease. HPO, annotations 2026-09-02.
- 2-3 toe syndactylyHPOHP:0004691
- 2 of 2 reported patients
- Curly eyelashesHPOHP:0007665
- 2 of 2 reported patients
- Feeding difficultiesHPOHP:0011968
- 1 of 1 reported patient
- Global developmental delayHPOHP:0001263
- 3 of 3 reported patients
- Intellectual disabilityHPOHP:0001249
- 14 of 14 reported patients
- Patent foramen ovaleHPOHP:0001655
- 1 of 1 reported patient
- Prominent nasal bridgeHPOHP:0000426
Show the remaining 64
- Long eyelashesHPOHP:0000527
- 18 of 19 reported patients
- Highly arched eyebrowHPOHP:0002553
- 17 of 18 reported patients
- HirsutismHPOHP:0001007
- 16 of 18 reported patients
- Bulbous noseHPOHP:0000414
- 12 of 14 reported patients
- Short footHPOHP:0001773
- 12 of 14 reported patients
- Thin upper lip vermilionHPOHP:0000219
- 13 of 16 reported patients
Genes
1 gene
Germline variants in the gene encoding each protein, as classified by GenCC submitters, each in their own words. Limited, disputed and refuted submissions are listed too.
- SMC3HGNC:2468
- Definitive · G2P · Autosomal dominant · 2025
- Strong · Labcorp Genetics (formerly Invitae) · Autosomal dominant · 2022
- Strong · PanelApp Australia · Autosomal dominant · 2025
Where it sits
Other names
3 names
Resolves to: Cornelia de Lange syndrome 3
- Also called
- Cornelia de Lange syndrome caused by mutation in SMC3Cornelia De Lange syndrome type 3SMC3 Cornelia de Lange syndrome