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Features include always present findings: Pulmonary hypoplasia; and common findings: Enlarged liver (hepatomegaly), Recurrent infections, Ventricular septal defect, and Aortic root aneurysm and others.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Lungs and breathing | 4 | Pulmonary hypoplasia, Pulmonary artery hypoplasia, High blood pressure in lung arteries (pulmonary arterial hypertension) |
ALDH1A2 encodes aldehyde dehydrogenase 1 family member A2 (518 aa). Catalyzes the NAD-dependent oxidation of aldehyde substrates, such as all-trans-retinal and all-trans-13,14-dihydroretinal, to their corresponding carboxylic acids, all-trans-retinoate and all-trans-13,14-dihydroretinoate, respectively. Highest expression in Uterus (50.7 TPM) and Cervix Ectocervix (49.7 TPM).
Diaphragmatic hernia 4, with cardiovascular defects is associated with mutations in the ALDH1A2 gene on chromosome 15.
The ALDH1A2 protein participates in ALDH1A2 tetramer, Expression of RET in the nephric duct, and Mammary stem cell produces myoepithelial/basal progenitor pathways.
ALDH1A2 is classified as a druggable target (Druggable Genome and Enzyme categories) with score 1.2.
Genetic testing for ALDH1A2 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for diaphragmatic hernia 4, with cardiovascular defects has been reported in the published literature.
Phenotype severity distribution: 1 always present feature, 27 common features.
No clinical trials have been registered for diaphragmatic hernia 4, with cardiovascular defects.
9 publications have been identified in PubMed for diaphragmatic hernia 4, with cardiovascular defects. Research spans Epidemiology / Natural History (33%), Diagnostic / Biomarker (22%), and Review / Meta-Analysis (22%).
Holden KI (2026). [PMID: 40848886](https://pubmed.ncbi.nlm.nih.gov/40848886/). *The Annals of thoracic surgery*. [Epidemiology / Natural History]
Pugnaloni F (2026). [PMID: 41250641](https://pubmed.ncbi.nlm.nih.gov/41250641/). *Journal of perinatal medicine*. [Epidemiology / Natural History]
Sabharwal S (2025). [PMID: 39757195](https://pubmed.ncbi.nlm.nih.gov/39757195/). *Journal of cardiothoracic surgery*. [Review / Meta-Analysis]
Zhao W (2025). [PMID: 40708788](https://pubmed.ncbi.nlm.nih.gov/40708788/). *Frontiers in physiology*. [Review / Meta-Analysis]
Lee WT (2024). [PMID: 39694918](https://pubmed.ncbi.nlm.nih.gov/39694918/). *Pediatric surgery international*. [Diagnostic / Biomarker]
Data assembled from 5 of 12 sources · Last updated Sep 19, 2026, 3:00 PM UTC
Online Mendelian Inheritance in Man
Heart and blood vessels |
3 |
Ventricular septal defect, Aortic root aneurysm, High blood pressure in lung arteries (pulmonary arterial hypertension) |
Arms and legs | 3 | 2-3 toe syndactyly, Finger syndactyly, Clinodactyly of the 5th finger |
Head and neck | 2 | Macrocephaly, Coronal cleft vertebrae |
Digestive system | 1 | Enlarged liver (hepatomegaly) |
Blood and immune system | 1 | Recurrent infections |
Eyes | 1 | Optic nerve hypoplasia |
Bones and joints | 1 | Coronal cleft vertebrae |
Pregnancy and birth | 1 | Neonatal respiratory distress |
Hergert B (2024). [PMID: 39376620](https://pubmed.ncbi.nlm.nih.gov/39376620/). *Frontiers in cardiovascular medicine*. [Clinical Trial Publication]
Thériault S (2024). [PMID: 38494474](https://pubmed.ncbi.nlm.nih.gov/38494474/). *Nature communications*. [Epidemiology / Natural History]
Renik-Jankowska W (2024). [PMID: 38428682](https://pubmed.ncbi.nlm.nih.gov/38428682/). *Biochimica et biophysica acta. Molecular basis of disease*. [Case Report / Case Series]
Cao Y (2024). [PMID: 39145735](https://pubmed.ncbi.nlm.nih.gov/39145735/). *Radiology. Cardiothoracic imaging*. [Diagnostic / Biomarker]