agnathia-otocephaly complex
Findings
No curated finding names agnathia-otocephaly complex yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Agnathia-holoprosencephaly-situs inversus syndrome is an extremely rare and fatal association syndrome, characterized by absence of the mandible, cerebral malformations with facial anomalies related to a defect in cleavage in the embryonic brain (e.g. synophthalmia, malformed and low-set ears fused in midline (otocephaly), agenesis of the olfactory bulbs, microstomia, hypoglossia/aglossia) and situs inversus partialis or totalis.
Definition from the Mondo Disease Ontology (MONDO:0008740), read 2026-09-29. CC BY 4.0.
- Inheritance
- Autosomal dominant inheritance · Autosomal recessive inheritance
- Onset and course
- Fetal onset
HPO, annotations 2026-09-02
Features
28 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.
- Cleft palateHPOHP:0000175
- 1 of 1 reported patient
- Downslanted palpebral fissuresHPOHP:0000494
- 2 of 2 reported patients
- Hypoplasia of the epiglottisHPOHP:0005349
- 1 of 1 reported patient
- Laryngeal hypoplasiaHPOHP:0008749
- 1 of 1 reported patient
- Low-set earsHPOHP:0000369
- 2 of 2 reported patients
- Mandibular aplasiaHPOHP:0009939
Genes
2 genes
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.
- OTX2HGNC:8522
- Strong · PanelApp Australia · Autosomal dominant · 2025
- PRRX1HGNC:9142
- Strong · PanelApp Australia · Autosomal dominant · 2025
- Supportive · Orphanet · Autosomal dominant · 2021
- Limited · Ambry Genetics · Autosomal dominant · 2025
- Limited · Labcorp Genetics (formerly Invitae) · Unknown · 2018
- Limited · G2P · Autosomal dominant · 2025
- Limited · G2P · Autosomal recessive · 2025
Where it sits
Other names
4 names
Resolves to: agnathia-otocephaly complex
- Also called
- agnathia-holoprosencephaly-situs inversus syndromedysgnathia complex agnathia-holoprosencephalyholoprosencephaly-agnathiaotocephaly