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Angioedema, Hereditary, Types I and II

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.