A patient presents with history of episodic painful edema of face and larynx. Which of the following is likely to be deficient –
Recurrent episodes of edema of face and larynx suggest the diagnosis of hereditory angioneurotic edema caused by deficiency of C1 esterase inhibitor.
Complement C3
Complement C5
C1 Esterase Inhibitor
Properidin
C1 Esterase Inhibitor