Other Bleeding Conditions

OTHER BLEEDING CONDITIONS

Factor I Deficiency (Fibrinogen)

Congenital fibrinogen defects are a group of rare coagulation disorders that include afibrinogenemia, hypofibrinogenemia, and dysfibrinogenemia. These disorders are classified based on the nature of the fibrinogen abnormality: afibrinogenemia and hypofibrinogenemia are quantitative defects, meaning they are characterized by an absent or low level of fibrinogen, while dysfibrinogenemia is a qualitative defect, where the fibrinogen present does not function properly.

Fibrinogen, also known as Factor I, is a crucial protein involved in platelet aggregation and the formation of stable blood clots. A deficiency in fibrinogen leads to a combined bleeding disorder, as both platelet function and clotting ability are impaired. Afibrinogenemia refers to the complete absence of fibrinogen, while hypofibrinogenemia involves abnormally low levels of fibrinogen, typically below 100 mg/dL of blood.

Both afibrinogenemia and hypofibrinogenemia are inherited in an autosomal dominant manner, meaning they can affect both males and females equally. The severity of the bleeding symptoms is directly related to the amount of fibrinogen present. Afibrinogenemia is often diagnosed in newborns and may lead to serious bleeding complications, including bleeding from the umbilical cord, genitourinary tract, or central nervous system. Individuals with hypofibrinogenemia may experience varying degrees of bleeding, ranging from mild to severe.

Dysfibrinogenemia is caused by mutations in the fibrinogen molecule, resulting in abnormal fibrinogen that is structurally altered and may not function properly in clot formation. There are over 70 known types of dysfibrinogenemia, but many individuals with this condition do not experience significant symptoms. However, some may be prone to developing abnormal blood clots (thrombosis), which can lead to serious complications such as deep vein thrombosis or pulmonary embolism.

Treatment for these disorders is generally not required for individuals with mild symptoms, particularly those with hypofibrinogenemia or dysfibrinogenemia. For those with more severe bleeding or clotting issues, treatment may include the administration of cryoprecipitate or fresh frozen plasma to replenish fibrinogen levels. In cases of thrombosis associated with dysfibrinogenemia, anticoagulants may be prescribed to reduce the risk of clot formation.

Management of these conditions requires a tailored approach based on the severity of the disorder and the individual’s specific symptoms. Regular monitoring and appropriate medical interventions can help manage bleeding or clotting risks and improve overall health outcomes for affected individuals.

Factor XI Deficiency

This hereditary disorder occurs primarily in Jews of eastern European ancestry, resumably because intermarriage within this closed group, generation after generation, allowed the defective gene to surface more frequently. In the United States, for example, most cases are found in New York and Los Angeles. Approximately 200 cases of Factor XI deficiency have been reported since it was identified in 1953.

Most patients with Factor XI deficiency have little or no bleeding. Often there is no correlation between bleeding episodes and the level of factor.

If you have factor XI deficiency, chances are your symptoms are milder than those of either haemophilia A or haemophilia B and there may be no strong relationship between your factor XI levels and bleeding complications. You may be prone to bruising, nose-bleeds, or blood in your urine. Prolonged bleeding after childbirth can occur. But you are not likely to bleed spontaneously, and haemorrhage is usually a problem only after an injury or surgery. Joint bleeds are uncommon, but delayed bleeding (starting an unexpectedly long time after an injury) may be a problem.

Factor V Deficiency (Proaccelerin)

Factor V deficiency is also known as Owren’s disease or parahaemophilia. This deficit was identified in Norway in 1943. Since then about 150 cases have been reported, occurring in both men and women.

The role of Factor V is to accelerate the activity of thrombin. When levels of Factor V are low, clotting is delayed or progresses slowly. People with this deficiency may have occasional nosebleeds, excessive menstrual bleeding, and bruising, although many have no symptoms. The first sign of this condition may be bleeding following surgery. The treatment is administration of fresh frozen plasma is not given because Factor V deteriorates rapidly.

Factor VII Deficiency (Proconvertin)

This disorder is rare, occurring in one in 500,000 males and females. Diagnosis is made by testing for Factor VII in the blood. Congenital Factor VII deficiency should be distinguished from acquired Factor VII deficiency that may result from liver disease, vitamin K deficiency, or other malabsorption conditions.

When levels of the factor are less than 1% of normal, bleeding can be severe. The trauma of birth may cause bleeding in the head of a newborn. Circumcision may cause heavy bleeding. Children and adults may suffer bleeding from nose, gums, or gastrointestinal tract, and women may suffer excessive menstrual bleeding.

Factor X Deficiency

Factor X deficiency ranks with Factor II as one of the rarest inherited clotting disorders, with only about 50 reported cases. Some cases are due to reduced or absent synthesis of the molecule; in other cases, the number of molecules is normal, but they don’t work properly. Several genetic variations of Factor X deficiency of varying severity have been described.

Factor XIII Deficiency

A hallmark of this rare inherited deficiency is poor wound healing and abnormal scar formation. The reason is that Factor XIII – fibrin stabilisation factor – is necessary for clot formation and wound healing.

The most common clinical symptom, seen in over 80% of cases, is bleeding from umbilical stump after birth. Bleeding episodes are usually lifelong and include severe bruising, hematomas, and prolonged bleeding after trauma. Characteristically, bleeding is delayed for several hours or days after trauma. Haemorrhage into the brain or spinal cord area is more common than in other inherited coagulation disorders and can be life-threatening. Plasma replacement is given to pregnant women to prevent spontaneous abortions.

Factor II Deficiency (Prothrombin)

Only 30 cases of this hereditary clotting factor defect have been identified in the whole world. It may take the form of a deficiency of prothrombin or an abnormal Factor II molecule. Either form may lead to severe bruising, excessive menstrual bleeding, postoperative hemorrhage, and occasionally muscle hematomas.