Hemophilia A (F8) Sequencing

Casandra

Casandra Test Code AR08682Version 1 (DRAFT)

Performing Lab

Lab ARUP LaboratoriesLab Test ID 3004241CPT Code 81407

Hemophilia A (F8) Sequencing

Also known as: F8 NGS

Clinical Use

Order Test

Use

Use the test to identify causal F8 variant in individuals with mild to moderate hemophilia A or to determine carrier status for those with a family history of mild to moderate hemophilia A. It provides critical insights into the genetic basis of hemophilia A and aids in managing and counseling affected individuals and their families. The test is particularly useful in determining carrier status and understanding the inheritance of hemophilia A, an X-linked recessive genetic disorder characterized by the deficiency of factor VIII clotting activity. Identifying pathogenic variants in the F8 gene helps guide treatment and management decisions for patients and at-risk family members.

Special Instructions

Testing is not New York state approved. Specimens from New York clients will be sent out to a New York state-approved laboratory. An Informed Consent for Genetic Testing is required for NY patients, and a Patient History Form for Hemophilia A Gene Testing is required for submitting the order.

Limitations

This test detects variants within the coding regions and intron-exon boundaries of the F8 gene. It does not detect the common intron 22-A and intron 1 inversions. Regulatory region variants and deep intronic variants are not identified. Deletions/duplications/insertions of any size may not be detected by this methodology. Diagnostic errors can occur due to rare sequence variations or the presence of pseudogenes, repetitive, or homologous regions. The test may not detect low-level mosaic or somatic variants. Interpretation may be impacted by allogeneic stem cell transplantation. Variants greater than 10 base pairs might be detected, but the analytical sensitivity is reduced.

Test Details