A patient presents with recurrent swelling of the lips as shown. He has no itching. Family history is positive. Which of the following is deficient in this patient?
Correct Answer: C1 inhibitor
Description: This boy presents with features of hereditary angioneurotic edema, which is due to deficiency of C1 inhibitor. C1 inhibitor deficiency - Hereditary angioedema. C1, C2, C4 deficiency - Collagen vascular disorders C5-C8 deficiency - Recurrent bacteremia with Neisseria. Reference: Ananthanarayan and Paniker&;s Textbook of Microbiology Tenth edition
Category:
Microbiology
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