intellectual disability-sparse hair-brachydactyly syndrome
Findings
No curated finding names intellectual disability-sparse hair-brachydactyly syndrome yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Intellectual disability-sparse hair-brachydactyly syndrome is a very rare condition of unknown etiology consisting of short stature, hypotrichosis, brachydactyly with cone-shaped epiphyses, epilepsy and severe mental delay. After the initial delineation of this syndrome by Nicolaides and Baraitser in 1993, only five more patients were published in the literature up to now.
Definition from the Mondo Disease Ontology (MONDO:0011053), read 2026-09-29. CC BY 4.0.
- Inheritance
- Autosomal dominant inheritance
- Onset and course
- Neonatal onset
HPO, annotations 2026-09-02
Features
97 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.
- Intellectual disabilityHPOHP:0001249
- 36 of 36 reported patients
- Very frequent (80% to 99% of cases)
- Sandal gapHPOHP:0001852
- 3 of 3 reported patients
- Frequent (30% to 79% of cases)
- SeizureHPOHP:0001250
- 22 of 35 reported patients · Childhood onset
- 3 of 3 reported patients
- Frequent (30% to 79% of cases)
- Triangular faceHPOHP:0000325
- 3 of 3 reported patients
- Very frequent (80% to 99% of cases)
- Wide mouthHPOHP:0000154
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.
- SMARCA2HGNC:11098
- Definitive · Ambry Genetics · Autosomal dominant · 2015
- Definitive · ClinGen · Autosomal dominant · 2020
- Definitive · G2P · Autosomal dominant · 2025
- Strong · Labcorp Genetics (formerly Invitae) · Autosomal dominant · 2022
- Strong · PanelApp Australia · Autosomal dominant · 2025
- Supportive · Orphanet · Autosomal dominant · 2021
Where it sits
Other names
2 names
Resolves to: intellectual disability-sparse hair-brachydactyly syndrome
- Also called
- Nicolaides-Baraitser syndromeSMARCA2-related BAFopathy