A Novel SCNN1B Mutation in a Neonate With Systemic Pseudohypoaldosteronism Type 1: Case Report
Ensiyeh Bahadoran1, Fatemeh Saffari2, Sahar Moghbelinejad1
1Cellular and Molecular Research Center Research Institute for Prevention of Non-Communicable Diseases, Qazvin University of Medical Sciences Qazvin Iran.
Clinical Case Reports
|January 12, 2026
Summary
Early recognition of Pseudohypoaldosteronism type 1B (PHA1B) in newborns with persistent hyperkalemia and hyponatremia is crucial. This case identifies a new SCNN1B mutation, underscoring the need for lifelong monitoring.
Area of Science:
- Pediatric Endocrinology
- Nephrology
- Medical Genetics
Background:
- Pseudohypoaldosteronism type 1B (PHA1B) presents with electrolyte imbalances in neonates.
- Persistent hyperkalemia and hyponatremia are key clinical indicators requiring prompt attention.
Purpose of the Study:
- To report a case of PHA1B in a neonate.
- To highlight a novel SCNN1B gene mutation associated with PHA1B.
- To emphasize the importance of genetic confirmation and long-term management.
Main Methods:
- Clinical case presentation.
- Genetic analysis to identify mutations in the SCNN1B gene.
Main Results:
- A novel mutation in the SCNN1B gene was identified in the affected neonate.
- The mutation was linked to the clinical presentation of PHA1B.
Conclusions:
- Early diagnosis of PHA1B through recognition of hyperkalemia and hyponatremia is vital for intervention.
- Genetic testing confirms PHA1B and guides management.
- This case expands the known SCNN1B mutation spectrum and stresses the necessity of lifelong monitoring for preventing severe complications.
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