Hereditary Angioedema Types I and II

**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.

**Tree numbers:** - C14.907.079.500.750 - C17.800.862.945.066.500.750 - C20.543.480.904.066.500.750

**Synonyms:** - C1 Esterase Inhibitor, Deficiency Of - Deficiency of C1 Esterase Inhibitor - Hereditary Angioedema Type 1 - Angioedema, Hereditary, Types I and II