syndactyly type 1
MONDO:0008512Mondo
Findings
No curated finding names syndactyly type 1 yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Syndactyly type 1 (SD1), also named zygodactyly in the past, is a distal limb malformation characterized by complete or partial webbing between the 3th and 4th fingers and/or the 2nd and 3rd toes.
Definition from the Mondo Disease Ontology (MONDO:0008512), read 2026-09-29. CC BY 4.0.
- Inheritance
- Autosomal dominant inheritance
- Onset and course
- Congenital onset
HPO, annotations 2026-09-02
Features
6 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
- Very frequent (80% to 99% of cases)
- 3-4 finger osseus syndactylyHPOHP:0006097
- Very frequent (80% to 99% of cases)
- Toe syndactylyHPOHP:0001770
- Very frequent (80% to 99% of cases)
- Finger symphalangismHPOHP:0009700
- Occasional (5% to 29% of cases)
- Sagittal craniosynostosisHPOHP:0004442
- Occasional (5% to 29% of cases)
- 3-4 finger cutaneous syndactylyHPOHP:0011939