Congenital Afibrinogenemia

What is Congenital Afibrinogenemia?

Congenital afibrinogenemia is a rare genetic bleeding disorder. People with this condition are born without fibrinogen in their blood. Fibrinogen is a protein that helps your blood clot when you get cut or injured.

Without fibrinogen, blood cannot form clots properly. This means bleeding can last much longer than normal. The condition affects about 1 in 1 million people worldwide. It is inherited when both parents pass on a mutated gene.

This is a lifelong condition that requires ongoing medical care. Treatment focuses on preventing bleeding episodes and managing symptoms. With proper care, many people with this condition can lead active lives.

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Symptoms

Excessive bleeding after injury or surgery
Bleeding from the umbilical cord at birth
Easy bruising that appears without clear cause
Nosebleeds that are hard to stop
Bleeding in the mouth or gums
Heavy menstrual periods in women
Bleeding into joints or muscles
Internal bleeding in severe cases
Bleeding in the brain, which can be life threatening

Symptoms often appear in infancy or early childhood. Some people experience their first major bleeding episode after an injury or surgery. The severity of symptoms can vary between individuals.

Causes and risk factors

Congenital afibrinogenemia is caused by mutations in genes that make fibrinogen. The condition is inherited in an autosomal recessive pattern. This means both parents must carry the mutated gene for a child to develop the condition. Parents who carry one copy usually have no symptoms themselves.

Three genes can cause this condition when mutated. These are FGA, FGB, and FGG. When both copies of one of these genes are faulty, the body cannot produce fibrinogen. There are no lifestyle or environmental risk factors. The condition is purely genetic and present from birth.

How it's diagnosed

Diagnosis begins with blood tests that measure clotting function. Doctors check fibrinogen antigen levels to see if fibrinogen is present in the blood. People with congenital afibrinogenemia have extremely low or undetectable fibrinogen levels. Other clotting tests like prothrombin time and activated partial thromboplastin time will show abnormal results.

Genetic testing can confirm the diagnosis by identifying mutations in fibrinogen genes. Family history is also important for diagnosis. Because this is a rare condition, specialized testing through a hematologist is usually required. Talk to a doctor if you or your child has unexplained bleeding problems.

Treatment options

Fibrinogen replacement therapy through intravenous infusions
Cryoprecipitate transfusions to provide fibrinogen during bleeding episodes
Fresh frozen plasma as an alternative source of fibrinogen
Preventive treatment before surgery or dental procedures
Avoiding activities with high injury risk
Avoiding medications that affect blood clotting like aspirin
Regular monitoring by a hematologist
Genetic counseling for family planning decisions
Emergency treatment plan for severe bleeding
Wearing medical alert jewelry to inform emergency responders

Frequently asked questions

Both are bleeding disorders but affect different clotting proteins. Congenital afibrinogenemia involves missing fibrinogen, while hemophilia involves missing clotting factors VIII or IX. Congenital afibrinogenemia is much rarer than hemophilia. Treatment approaches differ based on which protein is missing.

There is currently no cure for this genetic condition. Treatment focuses on managing symptoms and preventing bleeding episodes. Fibrinogen replacement therapy must be given regularly or when bleeding occurs. Gene therapy research is ongoing but not yet available as treatment.

The condition follows an autosomal recessive inheritance pattern. Both parents must carry a mutated gene for their child to have the condition. If both parents are carriers, each child has a 25% chance of having the condition. Genetic counseling can help families understand their risks.

Brain bleeding is the most life threatening complication. Joint bleeding can cause long term damage and pain. Internal bleeding in organs can occur without obvious injury. Bleeding during pregnancy or childbirth requires careful medical management.

Treatment frequency varies by individual. Some people need preventive infusions regularly to maintain safe fibrinogen levels. Others receive treatment only during bleeding episodes or before procedures. Your hematologist will create a personalized treatment plan.

Pregnancy is possible but requires specialized care. Women need close monitoring throughout pregnancy and delivery. Fibrinogen replacement therapy is often needed during pregnancy. A team of specialists including a hematologist and high risk obstetrician should manage the pregnancy.

Contact sports and activities with high injury risk should be avoided. This includes football, boxing, hockey, and extreme sports. Swimming, walking, and low impact activities are generally safer. Always discuss activity choices with your doctor.

Newborns may be diagnosed after prolonged bleeding from the umbilical cord. Blood tests measuring fibrinogen levels confirm the diagnosis. Genetic testing identifies the specific mutation. Early diagnosis allows for proper monitoring and preventive care.

Yes, there are several related conditions. Afibrinogenemia means no fibrinogen is present. Hypofibrinogenemia means fibrinogen levels are low but not absent. Dysfibrinogenemia means fibrinogen is present but does not work properly.

Contact your hematologist or go to the emergency room immediately. Apply pressure to external bleeding sites while seeking help. Do not take aspirin or other blood thinning medications. Follow your personalized emergency treatment plan provided by your doctor.