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A rare, genetic, hematological disease characterized by decreased levels of antithrombin activity in plasma resulting in impaired inactivation of thrombin and factor Xa. Patients have an increased risk for venous thromboembolism, usually in the deep veins of the arms, legs and pulmonary system and, on occasion, in other venous territories (e.g. cerebral veins or sinus, mesenteric, portal, hepatic, renal and/or retinal veins).
Features include always present findings: Decreased level of heparin co-factor II and Recurrent thrombophlebitis; and very common findings: Reduced antithrombin III activity and Reduced antithrombin antigen. 15 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Lab test results | 1 | Decreased level of heparin co-factor II |
Brain and nerves | 1 | Cerebral venous thrombosis |
Lungs and breathing | 1 | Pulmonary embolism |
Eyes | 1 | Retinal vein occlusion |
Digestive system | 1 | Hepatic vein thrombosis |
SERPINC1 function has not been fully characterized.
Hereditary antithrombin deficiency is caused by mutations in the SERPINC1 gene on chromosome 1.
Genetic testing for SERPINC1 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for hereditary antithrombin deficiency has been reported in the published literature.
Phenotype severity distribution: 2 always present features, 2 very common features, 4 common features.
Estimated prevalence: 1-5 in 10,000 (Uncommon).
3 clinical trials registered, 1 recruiting. Interventions under study include drug therapy and other interventions. Pipeline includes 1 PHASE3, 1 PHASE2. Research is sponsored by a mix of industry and academic institutions.
94 publications have been identified in PubMed for hereditary antithrombin deficiency. Research spans Case Report / Case Series (34%), Review / Meta-Analysis (21%), and Epidemiology / Natural History (15%).
Research Type | Count | % of Total |
|---|---|---|
Patient case studies | 32 | 34% |
Research summaries | 20 | 21% |
Disease patterns and progression | 14 | 15% |
Laboratory research | 12 | 13% |
Testing and diagnosis research | 6 | 6% |
Clinical study results | 5 | 5% |
Other research | 4 | 4% |
New treatment approaches | 1 | 1% |
Yi X (2026). [PMID: 41713385](https://pubmed.ncbi.nlm.nih.gov/41713385/). *Thromb Res*. [Other]
Zhao Y (2026). [PMID: 40097149](https://pubmed.ncbi.nlm.nih.gov/40097149/). *Thromb Haemost*. [Case Report / Case Series]
Asakura H (2026). [PMID: 41761262](https://pubmed.ncbi.nlm.nih.gov/41761262/). *Thromb J*. [Clinical Trial Publication]
Rath W (2026). [PMID: 41961304](https://pubmed.ncbi.nlm.nih.gov/41961304/). *Arch Gynecol Obstet*. [Review / Meta-Analysis]
Dix C (2026). [PMID: 40784553](https://pubmed.ncbi.nlm.nih.gov/40784553/). *J Thromb Haemost*. [Basic Science / Preclinical]
AlShaer D (2026). [PMID: 41754785](https://pubmed.ncbi.nlm.nih.gov/41754785/). *Pharmaceuticals (Basel)*. [Review / Meta-Analysis]
Ochotnicka J (2026). [PMID: 41861498](https://pubmed.ncbi.nlm.nih.gov/41861498/). *Thromb Res*. [Basic Science / Preclinical]
Son BJ (2026). [PMID: 41876387](https://pubmed.ncbi.nlm.nih.gov/41876387/). *Catheter Cardiovasc Interv*. [Case Report / Case Series]
Zhou H (2026). [PMID: 42221117](https://pubmed.ncbi.nlm.nih.gov/42221117/). *Front Med (Lausanne)*. [Case Report / Case Series]
Hamulyák EN (2026). [PMID: 41500750](https://pubmed.ncbi.nlm.nih.gov/41500750/). *J Thromb Haemost*. [Clinical Trial Publication]
Data assembled from 8 of 12 sources · Last updated Sep 20, 2026, 3:00 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center