Complement Component 9 Deficiency, also known as c9 deficiency, is related to complement deficiency and meningococcal meningitis. An important gene associated with Complement Component 9 Deficiency is C9 (Complement C9), and among its related pathways/superpathways are IL-9 Signaling Pathways and Spinal cord injury. Affiliated tissues include skeletal muscle, and related phenotypes are decreased circulating complement c9 concentration and Increased shRNA abundance (Z-score > 2)