label: immunodeficiency due to a late component of complement deficiency
label_lc: immunodeficiency due to a late component of complement deficiency
description: A genetic deficiency of any membrane attack complex (MAC, also known as terminal component complex (TCC)) component of the complement system (C5, C6, C7, C8, C9). Deficiencies of the terminal complement pathway results in a predisposition to infections, such as invasive meningococcal disease or disseminated gonococcal infection.