Hereditary Angioedema With Normal C1inh Not Related To F12 Or Plg Variant C5681601
A rare form of hereditary angioedema with normal C1 inhibitor levels not linked to common genetic variants. Episodes of swelling may be triggered by stress or injury. Treatment includes avoiding triggers and medications like icatibant.
Key facts at a glance
- ICD-10
- R69
- ICD-11
- MA00.0
- Body system
- immunologic
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Facial swelling
Generalized symptoms
(immunologic)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Abdominal pain
(gastrointestinal)Urticaria
(integumentary)Fatigue
(immunologic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Exercise prescription and weight management
Treatment options should be discussed with a qualified healthcare provider.
Specialist Evaluation and Diagnosis Confirmation
Careful evaluation by an angioedema specialist to confirm diagnosis, rule out acquired causes, and establish an individualized treatment plan. This subtype requires careful characterization.
Acute Attack Treatment
Treatment of acute attacks with available options including icatibant, C1-INH concentrates, or ecallantide. Response may vary as the underlying pathophysiology differs from classic HAE.
Additional treatment options
Prophylactic Therapy
Long-term prophylaxis using tranexamic acid, androgens (if appropriate), or newer agents depending on response. Prophylaxis is considered for patients with frequent attacks affecting quality of life.
medicationTrigger Documentation
Meticulous documentation of potential triggers including medications, foods, stress, and environmental factors. Pattern recognition helps identify individual susceptibility factors.
lifestyleQuality of Life Support
Addressing the psychological impact of living with a rare angioedema subtype, including anxiety about unpredictable attacks, social limitations, and adjustment to chronic illness.
psychologicalWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Hereditary Angioedema With Normal C1inh Not Related To F12 Or Plg Variant C5681601?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Bork K, Witzke G, Kreuz W. Hereditary angioedema with normal C1-inhibitor: clinical features and diagnostic considerations. Allergy Clin Immunol Pract. 2022.
Maurer M, Magerl M, Ansotegui I, et al. The international WAO/EAACI guideline for the management of hereditary angioedema. World Allergy Organ J. 2021.
Ricketti D, Nalyvayko O, Hsu S, et al. Clinical characteristics and treatment outcomes in patients with hereditary angioedema and normal C1 esterase inhibitor. Ann Allergy Asthma Immunol. 2020.
Liu S, Wang Q, Zhao Q, et al. Hereditary angioedema with normal C1-inhibitor: a systematic review and meta-analysis. Clin Rev Allergy Immunol. 2023.
Medication Comparisons
Compare medications used to treat Hereditary Angioedema With Normal C1inh Not Related To F12 Or Plg Variant C5681601. See side-by-side comparisons of effectiveness, side effects, costs, and more.
View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy