• A V Emelyanov, E V Leshenkova, and G A Kameneva.
• Mechnikov North-Western State Medical University.
• Terapevt Arkh. 2020 Dec 15; 92 (12): 869086-90.

AbstractHereditary angioedema (HAE) with normal C1-inhibitor level is a rare potentially life-threatening disorder with autosomal dominant inheritance which was first described in 2000. Its clinical presentation is similar to HAE with C1-deficiency. The review is summarized data about its prevalence, mechanisms, genetics and diagnostic criteria. Different subtypes and treatment options (on demand, short term and long-term prophylaxis) are discussed. We describe family clinical cases of 2 female patients with normal C1-inhibitor and plasminogen gene mutation. Their features were late diagnosis (in 10 and 25 years after the onset of symptoms), family history (similar genetic mutation in 3 female members of the same family, including 1-asymtomatic) and combination of face, tongue, larynx and abdominal angioedema in patient and her sibling.

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