hyperphosphatasia with intellectual disability syndrome 2
Findings
No curated finding names hyperphosphatasia with intellectual disability syndrome 2 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 PIGO gene.
Definition from the Mondo Disease Ontology (MONDO:0013882), read 2026-09-29. CC BY 4.0.
- Inheritance
- Autosomal recessive inheritance
- Onset and course
- Congenital 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.
- Broad halluxHPOHP:0010055
- 3 of 3 reported patients
- Broad nasal tipHPOHP:0000455
- 3 of 3 reported patients
- Delayed ability to walkHPOHP:0031936
- 3 of 3 reported patients
- Delayed speech and language developmentHPOHP:0000750
- 3 of 3 reported patients
- Elevated circulating alkaline phosphatase concentrationHPOHP:0003155
- 3 of 3 reported patients
- Global developmental delayHPOHP:0001263
- 3 of 3 reported patients
- Growth delayHPO
Show the remaining 16
- Short noseHPOHP:0003196
- 3 of 3 reported patients
- Shortening of all distal phalanges of the fingersHPOHP:0006118
- 3 of 3 reported patients
- Tented upper lip vermilionHPOHP:0010804
- 3 of 3 reported patients
- Wide nasal bridgeHPOHP:0000431
- 3 of 3 reported patients
- Anal stenosisHPOHP:0002025
- 2 of 3 reported patients
- Aganglionic megacolonHPOHP:0002251
- 1 of 3 reported patients
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.
- PIGOHGNC:23215
- Definitive · G2P · Autosomal recessive · 2015
- Strong · Illumina · Autosomal recessive · 2019
- Strong · Labcorp Genetics (formerly Invitae) · Autosomal recessive · 2019
- Strong · PanelApp Australia · Autosomal recessive · 2025
Where it sits
Other names
5 names
Resolves to: hyperphosphatasia with intellectual disability syndrome 2
- Also called
- hyperphosphatasia with intellectual disability syndrome type 2hyperphosphatasia with mental retardation syndrome 2hyperphosphatasia with mental retardation syndrome type 2hyperphosphatasia-intellectual disability syndrome caused by mutation in PIGOPIGO hyperphosphatasia-intellectual disability syndrome