ARAUJO, Ana et al. Hereditary Angioedema: The Importance of Clinical Suspicion and Proper Treatment. []. , 25, 1, pp.40-42. ISSN 0872-671X.  https://doi.org/10.24950/rspmi/CC/146/1/2018.

Hereditary angioedema (HAE) is a syndrome characterized by episodic swelling of subcutaneous and submucosal tissues, due to a deficiency or dysfunctionality in functional C1 esterase inhibitor (C1-inh). The authors present a case of a 40 year-old man with a positive family history of HAE, recurrent episodes of abdominal pain, nausea and vomiting. The immunological study revealed low levels of C1-inh and C4 and normal levels of C1q. Acquired angioedema was excluded, making the diagnosis of type 1 HAE. The patient presented several times to the emergency department with severe abdominal pain, diffuse abdominal tenderness with guarding. However, laboratory and imagiologic studies had no alterations. A subcutaneous injection of icatibant was administered with resolution of symptoms. HAE is a rare and potentially fatal disease, mainly during acute attacks. An early diagnosis and a proper treatment are fundamental.

: Angioedemas; Hereditary; Complement C1 Inhibitor Protein; Icatibant.

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