Based on these findings, 4 additional HAEnCI types were defined: HAE with a specific mutation in the PLG gene (HAE-PLG), HAE with a specific mutation in the ANGPT1 gene (HAE-ANGPT1), HAE with a specific mutation in the KNG1 gene (HAE-KNG1), and HAE with a specific mutation in the MYOF gene (HAE-Myoferlin). The gene discussed is KNG1; the disease is hereditary angioedema.