Holt-Oram syndrome
Findings
No curated finding names Holt-Oram syndrome yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Holt-Oram syndrome (HOS) is the most common form of heart-hand syndrome and is characterized by skeletal abnormalities of the upper limbs and mild-to-severe congenital cardiac defects.
Definition from the Mondo Disease Ontology (MONDO:0007732), read 2026-09-29. CC BY 4.0.
- Inheritance
- Autosomal dominant inheritance
- Onset and course
- Congenital onset · Second trimester onset
HPO, annotations 2026-09-02
Features
110 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.
- 1-2 finger cutaneous syndactylyHPOHP:0010704
- 5 of 5 reported patients
- 11 pairs of ribsHPOHP:0000878
- 2 of 2 reported patients
- 2-3 finger cutaneous syndactylyHPOHP:0001233
- 1 of 1 reported patient
- Abdominal situs inversusHPOHP:0003363
- 1 of 1 reported patient
- Abnormal coronary artery originHPOHP:0011636
- 1 of 1 reported patient
- Aplasia of the 1st metacarpalHPOHP:0010035
- 3 of 3 reported patients
- Aplasia of the 2nd fingerHPO
Show the remaining 98
- Cleft soft palateHPOHP:0000185
- 2 of 2 reported patients
- Clinodactyly of the 5th fingerHPOHP:0004209
- 2 of 2 reported patients
- Cor triatriatum sinisterHPOHP:0031134
- 1 of 1 reported patient
- Distally placed thumbHPOHP:0009622
- 1 of 1 reported patient
- DolichocephalyHPOHP:0000268
- 1 of 1 reported patient
- Double outlet right ventricleHPOHP:0001719
- 1 of 1 reported patient
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.
- TBX5HGNC:11604
- Definitive · Ambry Genetics · Autosomal dominant · 2018
- Definitive · ClinGen · Autosomal dominant · 2025
- Definitive · G2P · Autosomal dominant · 2023
- Strong · Labcorp Genetics (formerly Invitae) · Autosomal dominant · 2021
- Strong · PanelApp Australia · Autosomal dominant · 2025
- Supportive · Orphanet · Autosomal dominant · 2021
Where it sits
Other names
4 names
Resolves to: Holt-Oram syndrome
- Also called
- atriodigital dysplasia type 1heart-hand syndrome type 1Holt Oram SyndromeHOS