Test Catalog

Test ID: F822P    
Hemophilia A F8 Gene, Intron 22 Inversion Mutation Analysis, Prenatal, Varies

Useful For Suggests clinical disorders or settings where the test may be helpful

Prenatal testing for hemophilia A when a F8 intron 22 inversion has been identified in a family member.

Genetics Test Information Provides information that may help with selection of the correct genetic test or proper submission of the test request

Detects the intron 22 inversion within the F8 gene. The intron 22 inversion mutation accounts for approximately 45% of mutations associated with severe hemophilia A.


Intron 22 inversion known mutation analysis on a prenatal specimen can only be performed when there is a known intron 22 inversion in the family.

Reflex Tests Lists tests that may or may not be performed, at an additional charge, depending on the result and interpretation of the initial tests.

Test IDReporting NameAvailable SeparatelyAlways Performed
CULAFAmniotic Fluid Culture/Genetic TestYesNo
CULFBFibroblast Culture for Genetic TestYesNo
MATCCMaternal Cell Contamination, BYesNo

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

If amniotic fluid is received, amniotic fluid culture/genetic test will be added and charged separately. If chorionic villus specimen is received, fibroblast culture for genetic test will be added and charged separately. For any prenatal specimen that is received, maternal cell contamination studies will be added. A maternal whole blood sample is required to perform this test.


The following algorithms are available in Special Instructions:

-Hemophilia Carrier Testing Algorithm

-Hemophilia Testing Algorithm

Special Instructions Library of PDFs including pertinent information and forms related to the test

Method Name A short description of the method used to perform the test

Inverse Shifting-Polymerase Chain Reaction (IS-PCR)

NY State Available Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name Lists a shorter or abbreviated version of the Published Name for a test

HA F8 Int22 Inversion KM, AF or CVS

Aliases Lists additional common names for a test, as an aid in searching

Hemophilia A
Factor VIII gene
Intron 22 inversion