label: hereditary angioedema with C1Inh deficiency
label_lc: hereditary angioedema with c1inh deficiency
description: "Forms of hereditary angioedema that occur due to mutations in the gene for complement C1 inhibitor protein. Type I hereditary angioedema is associated with reduced serum levels of complement C1 inhibitor protein. Type II hereditary angioedema is associated with the production of a non-functional complement C1 inhibitor protein."