The major causative genes underlying monogenic FH are the LDL‐receptor (LDLR) gene (OMIM: 606945), the apolipoprotein B‐100 (APOB) gene (OMIM: 107730), and/or the proprotein convertase subtilisin/kexin type 9 (PCSK9) gene (OMIM: 607786). Here, APOB is linked to familial hyperaldosteronism.