Mutations in the F8 gene cause hemophilia A, while hemophilia B is caused by mutations in the F9 gene. The proteins made by these genes play a critical role in the process of blood clotting.
There are many different types of imaging tests used to diagnose diseases of the digestive system. Computed Tomography (CT Scan) A CT scan, computed tomography, takes multiple X-rays of the body from different angles in a very short period of time.
Porphyrin testing is used to help diagnose and sometimes to monitor porphyrias. These disorders can be classified into two groups based on signs and symptoms: neurologic porphyrias and cutaneous porphyrias. As some porphyrias can have similar symptoms, testing is also used to help determine which type is present.