Quincke Edema – Causes, Symptoms and Treatment

What Is Quincke Edema?

Quincke edema (also known as angioedema or angioneurotic edema) is a rapid swelling of the deep layers of the skin and mucous membranes (subcutaneous and submucosal tissue). Unlike superficial allergic skin reactions, it affects deeper tissue and most commonly occurs on the face, lips, tongue, throat, larynx, hands, and genitals. In rare cases, internal organs may also be involved. Quincke edema can occur as part of an allergic reaction, but non-allergic causes also exist.

Causes

Several distinct forms of Quincke edema are recognized based on their underlying cause:

• Allergic angioedema: Triggered by allergens such as foods (e.g., nuts, fish), insect stings, medications, or latex. The release of histamine and other mediators causes blood vessel dilation and fluid leakage into the surrounding tissue.
• Hereditary angioedema (HAE): A rare genetic disorder caused by a deficiency or dysfunction of the C1-esterase inhibitor protein, leading to uncontrolled swelling episodes. This form is not allergy-related.
• ACE inhibitor-induced angioedema: Certain blood pressure medications (ACE inhibitors) can trigger angioedema as a side effect.
• Idiopathic angioedema: In some cases, no clear underlying cause can be identified.

Symptoms

Quincke edema typically develops within minutes to a few hours and presents with:

• Sudden, doughy, often asymmetric swelling
• Redness or pallor of the affected skin area
• Burning sensation or feeling of tightness (itching is usually mild, as deep layers are affected)
• Difficulty swallowing or hoarseness when the tongue or throat is involved
• Shortness of breath if the larynx is affected (medical emergency)
• Abdominal pain, nausea, or vomiting when the gastrointestinal tract is involved

Important: Involvement of the airways is a life-threatening emergency. Call emergency services immediately if breathing is compromised.

Diagnosis

Diagnosis is primarily clinical, based on the characteristic presentation. The following tests may support the diagnosis:

• Blood tests: Measurement of total IgE, specific IgE antibodies, complement factors (C3, C4), and C1-esterase inhibitor levels to rule out hereditary angioedema
• Allergy testing: Skin prick tests or specific allergy blood tests if an allergic cause is suspected
• Medication review: Assessment of whether the patient is taking ACE inhibitors

Treatment

Acute Management

For allergic Quincke edema, the following medications are used:

• Antihistamines (e.g., cetirizine, loratadine): Block the effects of histamine
• Corticosteroids (e.g., prednisolone): Reduce the inflammatory response
• Epinephrine (adrenaline): Used in severe cases with respiratory distress or anaphylactic shock, typically administered via auto-injector (e.g., EpiPen)

Treatment of Hereditary Angioedema

Hereditary angioedema is managed with specific therapies, including C1-esterase inhibitor concentrate, icatibant (a bradykinin receptor antagonist), or lanadelumab for long-term prophylaxis.

Long-Term Management

Identified triggers should be consistently avoided to prevent future episodes. Patients with severe allergic Quincke edema should always carry an emergency kit containing an antihistamine, corticosteroid, and epinephrine auto-injector.

References

1. Magerl M. et al. - S2k Guideline: Hereditary Angioedema. AWMF Registry No. 013-028 (2022). Association of Scientific Medical Societies in Germany (AWMF).
2. Zuberbier T. et al. - The international EAACI/GA2LEN/EuroGuiDerm/APAAACI guideline for the definition, classification, diagnosis, and management of urticaria. Allergy (2022).
3. Kaplan A. P. - Angioedema. World Allergy Organization Journal (2008).