Definition: 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.
Other names Hereditary Angioedema Type I; Angioedema, Hereditary, Types I and II; Hereditary Angioedema Type II; Angioedema, Hereditary, Type II; Angioedema, Hereditary, Type I