Hereditary angioedema. Complex symptoms can make diagnosis difficult.

Abstract

Although rare, hereditary angioedema is a potentially life-threatening disorder that can be difficult to diagnose. It is characterized by a deficiency in C1 esterase inhibitor (C1 INH). Manifestations include gastrointestinal, subcutaneous, and respiratory edema. Factors that trigger episodes vary. Symptoms typically last 48 to 72 hours, but they can last 4… (More)

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