Hyperaldosteronism, Familial, Type Ii, also known as familial hyperaldosteronism type ii, is related to familial hyperaldosteronism and contractures, pterygia, and spondylocarpotarsal fusion syndrome 1a. An important gene associated with Hyperaldosteronism, Familial, Type Ii is CLCN2 (Chloride Voltage-Gated Channel 2). Related phenotypes are hypertension and glucocortocoid-insensitive primary hyperaldosteronism