New mutation of CACNA1H p.Tyr613Phe in hyperaldosteronism: a case report

Background: Primary aldosteronism (PA) is an endocrine disorder characterized by the autonomous, excessive production of aldosterone from the adrenal glands. Familial hyperaldosteronism (FH) is one type of PA. FH is further subclassified into types I through IV according to different gene mutations. Case presentation: This paper reports a case of unilateral adrenal hyperplasia with germline CACNA1H mutation, p.His515Tyr and p.Tyr613Phe, confirmed by endocrine test, whole exome sequencing and Sanger sequencing 4 years after onset. The variants located within N-terminal close to the first transmembrane domain of the protein that was highly conserved across different species. Polyphen2 and PROVEAN predicted p.Tyr613Phe to be probably damaging and deleterious. Conclusion: These findings broaden the genetic spectrum of PA and offer novel insights into the molecular mechanisms driving excessive aldosterone production. Therefore, genetic sequencing is recommended for PA patients whose etiology remains unclear after standard clinical evaluation.