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Laboratory: Genomics
Test Name:
HEMOPHILIA B - FACTOR IX DEFICIENCY - F9 GENE - (B)
Test Code: MD
Clinical Information:
Comprehensive testing offered through "National Program for Hemophilia Mutation Testing" at Queen’s University.  Testing includes deletion/duplication, gene sequencing and promoter as indicated by the severity of factor IX deficiency.  Testing is considered INVESTIGATIONAL and is done through a RESEARCH protocol.  
Testing for confirmation of clinical diagnosis of factor IX deficiency.  Family history consistent with X-linked pattern of inheritance.  Carrier testing only available for patients with documented positive family history or confirmed 1st degree relative with clinically confirmed factor IX deficiency.  All out-of-province testing subjected to final laboratory approval.  For all prenatal testing, please contact Laboratory to determine sample requirements.
For more information, see:  http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=gene&part=hemo-b
Collection Devices:
Specimen Required:
Blood: 8.0 mL
Pediatric Blood: 3.0 mL

Specimen must be kept at room temperature.  Pediatric volume for infants only.  For prenatal diagnosis, contact laboratory for approval and to obtain specimen requirements.
Referral:
Requisition:
Reference Values:
An interpretive report from the reference laboratory will be forwarded to the physician.
Availability:
Extracted DNA is forwarded to an out-of-province laboratory for testing, if approved. Turnaround time is estimated to be 12 to 14 weeks. For milder presentation, results may be delayed.
See Also:
More Information:
Do NOT centrifuge.  Ship blood samples at room temperature to Health Sciences Centre - MS5.  Extracted DNA will be forwarded for testing to a reference laboratory.  Specimens sent for Molecular tests are not to be used for other tests (ie. CBC).