Question 1

What is Factor XIII deficiency?

Accepted Answer

Factor XIII deficiency is a rare bleeding disorder where the body lacks sufficient levels of clotting Factor XIII, which is essential for stabilizing blood clots and preventing re-bleeding.

Question 2

How rare is Factor XIII deficiency?

Accepted Answer

It is extremely rare, occurring in about 1 in 2 to 5 million people worldwide. It is one of the rarest of all inherited bleeding disorders.

Question 3

What are the symptoms of Factor XIII deficiency?

Accepted Answer

Symptoms include delayed bleeding after injury or surgery, spontaneous bleeding, poor wound healing, recurrent miscarriages, and in severe cases, life-threatening intracranial hemorrhage.

Question 4

What causes Factor XIII deficiency?

Accepted Answer

It can be inherited due to mutations in F13A1 or F13B genes or acquired from autoimmune conditions, liver disease, or medications.
Source: MedlinePlus (NIH)

Question 5

How is Factor XIII deficiency diagnosed?

Accepted Answer

Standard clotting tests like PT and aPTT are often normal. Diagnosis usually requires a specific Factor XIII activity assay or clot solubility test.

Question 6

What makes diagnosing Factor XIII deficiency challenging?

Accepted Answer

Routine coagulation tests are often normal, so the disorder may go undetected without specific testing for Factor XIII.
Source: National Organization for Rare Disorders (NORD)

Question 7

How does Factor XIII deficiency affect clotting test results?

Accepted Answer

Most routine clotting tests are normal in Factor XIII deficiency. A clot solubility test or specific Factor XIII assay is needed to detect the deficiency.

Question 8

What is the role of Factor XIII in blood clotting?

Accepted Answer

Factor XIII stabilizes the fibrin clot by cross-linking fibrin strands, making the clot stronger and more resistant to breakdown. Without it, clots may form but dissolve too early, causing bleeding.

Question 9

What is the difference between Factor XIII deficiency and hemophilia?

Accepted Answer

Hemophilia (A or B) involves deficiencies in Factors VIII or IX, leading to problems in forming clots. Factor XIII deficiency affects the stability of the clot after it has formed. Bleeding may occur later and last longer.

Question 10

Can Factor XIII deficiency be life-threatening?

Accepted Answer

Yes, especially in severe congenital cases. Life-threatening complications like brain hemorrhages have been reported, particularly in newborns or undiagnosed individuals.

Factor Xiii Deficiency Medications