hyperphosphatasia with intellectual disability syndrome 1
Findings
No curated finding names hyperphosphatasia with intellectual disability syndrome 1 yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Any hyperphosphatasia-intellectual disability syndrome in which the cause of the disease is a mutation in the PIGV gene.
Definition from the Mondo Disease Ontology (MONDO:0009398), read 2026-09-29. CC BY 4.0.
- Inheritance
- Autosomal recessive inheritance
HPO, annotations 2026-09-02
Features
27 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.
- Absent speechHPOHP:0001344
- 6 of 6 reported patients
- Elevated circulating alkaline phosphatase concentrationHPOHP:0003155
- 7 of 7 reported patients
- Global developmental delayHPOHP:0001263
- 7 of 7 reported patients
- HypotoniaHPOHP:0001252
- 5 of 5 reported patients · Infantile onset
- Intellectual disabilityHPOHP:0001249
- 7 of 7 reported patients
- Short distal phalanx of fingerHPOHP:0009882
- 7 of 7 reported patients
- Broad nasal tip
Show the remaining 15
- Abnormally large globeHPOHP:0001090
- Frequent (30% to 79% of cases)
- Long palpebral fissureHPOHP:0000637
- Frequent (30% to 79% of cases)
- Posteriorly rotated earsHPOHP:0000358
- Frequent (30% to 79% of cases)
- SeizureHPOHP:0001250
- 3 of 5 reported patients
- Small nailHPOHP:0001792
- Frequent (30% to 79% of cases)
- Thin upper lip vermilionHPOHP:0000219
- Frequent (30% to 79% of cases)
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.
- PIGVHGNC:26031
- Definitive · G2P · Autosomal recessive · 2023
- Strong · Labcorp Genetics (formerly Invitae) · Autosomal recessive · 2021
- Strong · PanelApp Australia · Autosomal recessive · 2025
- Moderate · Ambry Genetics · Autosomal recessive · 2018
- Moderate · ClinGen · Autosomal recessive · 2025
Where it sits
Other names
5 names
Resolves to: hyperphosphatasia with intellectual disability syndrome 1
- Also called
- hyperphosphatasia with intellectual disability syndrome type 1hyperphosphatasia with mental retardation syndrome 1hyperphosphatasia with mental retardation syndrome type 1hyperphosphatasia-intellectual disability syndrome caused by mutation in PIGVPIGV hyperphosphatasia-intellectual disability syndrome