Congenital antithrombin III deficiency

Below you will find more information about Congenital antithrombin III deficiency from Medigest. If you believe that you are suffering from any of the symptoms of Congenital antithrombin III deficiency it is important that you obtain an accurate diagnosis from a medical professional to ensure that you obtain the correct medication or treatment for your condition. There are medical conditions that carry similar symptoms associated with Congenital antithrombin III deficiency and therefore the information provided by Medigest is offered as a guideline only and should never be used in preference to seeking professional medical advice. The information relating to Congenital antithrombin III deficiency comes from a third party source and Medigest will not be held liable for any inaccuracies relating to the information shown.


Congenital antithrombin III deficiency is defined as the lack of the potent inhibitor for the coagulation cascade. This is categorized as a non-vitamin K-dependent protease that is known to exhibit the coagulation through lysing factor and thrombin. This type of deficiency is categorized as an autosomal dominant disorder that an infant can inherit through a copy of a defective gene. For severe congenital antithrombin III deficiency, the neonate has inherited 2 types of defective genes and is often easily noted during infancy stage.


Protein C tests, ATIII measurements, as well as protein S deficiencies are among the primary medical tests conducted for infants with congenital antithrombin III deficiency.


Treatment of patients suffering from congenital antithrombin III deficiency depends would largely depend on the clinical setting. For neonates with homozygote deficiency, both the venous and arterial thrombosis is examined, principally if treatment involves vascularly invasive procedures such as umbilical vessel catheterization and extracorporeal membrane oxygenation.

Symptoms and Signs

There are no physical symptoms that can be associated to congenital antithrombin III deficiency. However, for homozygote deficient neonates, they may display purpura fulminans, which is a type of embolic lesions that develops on the skin. Infants usually appear normal and usually don't have any symptoms unless there are other existing medical conditions.


There are actually two different types of ATIII Deficiency that may be largely due to a number of varying genetic defects that can be directly with associated with conflicting levels of enzymatic activity, enzyme production and chemical stability.

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