Angioedema (BE: angiooedema), also known by its eponym Quincke's edema and the older term angioneurotic edema, is the rapid swelling (edema) of the skin, mucosa and submucosal tissues. Apart from the common form, mediated by allergy, it has been reported as a side effect of some medications, specifically ACE inhibitors. Additionally, there is an inherited form, due to deficiency of the blood protein C1-inhibitor. This form is called hereditary angioedema (HAE) or hereditary angio-neurotic edema (HANE), which is due to C1-esterase inhibitor deficiency.
Cases where angioedema progresses rapidly should be treated as a medical emergency as airway obstruction and suffocation can occur. Rapid treatment with epinephrine, often with an epi-pen, can be life-saving.

Hereditary Angioedema - A definition along with a look at the causes, incidence and risk factors.
Hereditary Angioedema Support Group - A non profit Organization dedicated to those families that are touched by a rare blood disease known as Hereditary Angioedema
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MedicineNet.com - Medical Dictionary - A brief article about hereditary angioedema.
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Reader Digest Health - Hereditary Angioedema, a general discussion, alternate names and resources.
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