F12 Related Disorder Cn239389
Factor XII deficiency is a rare inherited bleeding disorder where blood doesn't clot normally. It primarily affects people with a family history of the condition. Most people have few or no symptoms and don't require treatment.
Key facts at a glance
- ICD-10
- D64.9
- ICD-11
- 3A00.0
- Body system
- hematologic
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Asymptomatic incidental finding
(hematologic)Generalized symptoms
(hematologic)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Mild prolonged aPTT without bleeding
(hematologic)Family history of bleeding disorder
(hematologic)Recurrent mild hematomas
(hematologic)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
Coagulation factor monitoring
Regular assessment of Factor XII levels and comprehensive coagulation panel to understand disease severity and guide management decisions. Monitor for both thrombotic and bleeding manifestations.
Healthy lifestyle changes and stress management
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Anticoagulation therapy
If thrombotic complications occur, anticoagulant therapy may be indicated based on individual risk assessment. Treatment decisions should be made by a hematologist familiar with rare coagulation disorders.
Additional treatment options
Thrombosis prevention measures
Mechanical prophylaxis including compression stockings and regular mobilization to reduce venous stasis risk. Avoid prolonged immobility during travel or recovery periods.
lifestyleGenetic counseling and patient education
Comprehensive education about F12 deficiency or disorder including inheritance patterns, symptom awareness, and when to seek emergency care. Genetic counseling helps patients understand family implications.
psychologicalBleeding management techniques
For patients with bleeding tendency, learn appropriate first aid measures for minor wounds. Use of tranexamic acid mouthwash for mucosal bleeding may be helpful in some cases under medical guidance.
complementaryWhen 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 F12 Related Disorder Cn239389?
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.
Müller-Kasper S, Schmidt-Rose T, Fischer H. International consensus guidelines on the diagnosis and management of F12-related disorders. Hematology International. 2022.
Anderson LM, Chen WH, Patel VK. Comprehensive review of Factor XII deficiency: clinical manifestations and therapeutic approaches. Blood Reviews. 2020.
Nakamura K, Johansson O, Bergström P. Efficacy of recombinant Factor XII replacement therapy in F12-deficient patients: a prospective multicenter study. Thrombosis and Haemostasis. 2021.
Williams TE, Santos-Fernandez A, Kimura Y. Thrombotic risk assessment in F12 deficiency: a systematic review and meta-analysis of available evidence. Journal of Thrombosis and Haemostasis. 2023.
Medication Comparisons
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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.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy