A Novel SCNN1B Mutation in a Neonate With Systemic Pseudohypoaldosteronism Type 1: Case Report.

Early recognition of PHA1B in neonates with persistent hyperkalemia and hyponatremia is important for timely intervention. Genetic testing confirms the diagnosis, guiding long-term management. This case highlights a novel SCNN1B mutation, expanding the genetic spectrum and emphasizing the need for lifelong monitoring to prevent life-threatening complications.