A 2-year-old female presents with difficulty breathing and an edematous appearance. Her mother reports that the condition is recurrent and seems to occur more often during stressful situations. The child is diagnosed with angioneurotic edema. Which of the following is deficient in this child?
A) C1 esterase inhibitor
B) Carboxypeptidase
C) Neutrophils
D) Plasmin

Question

Quizplus · Accepted Answer

Angioneurotic edema is caused by a deficiency of C1 esterase inhibitor, which leads to uncontrolled activation of the complement and kinin cascades, resulting in increased vascular permeability and edema formation. Carboxypeptidases are not directly involved in this condition, and neutrophils and plasmin are not specific to the pathophysiology of angioneurotic edema.

A 2-Year-Old Female Presents with Difficulty Breathing and an Edematous