Epic Code LAB1230930 HLA Class I Disease Association
Test Name Alias
HLA typing, HLA-A, B, C typing, tissue typing, HLA Class I Typing for disease association, HLA-A29 Genotyping (Birdshot Chorioretinopathy), HLA-B27 Genotyping (Spondyloarthropathies), HLA-B51 Genotyping (Bechet's Disease)
Quick Collect
+WB/A
Invert several times to mix well.
Shipping/Handling Instructions: Do not refrigerate or freeze specimen. Maintain whole blood at room temperature (20-26°C or 68-78.8°F) prior to transport. Transport to the Laboratory within 72 hours of collection.
Clinical Information
HLA Class I genotyping defines the antigens of the HLA-A, B and C loci of the Major Histocompatibility Complex found on the short arm of chromosome 6. Using DNA extracted from leukocytes, HLA-A, B and C alleles are amplified via PCR using sequence-specific primers. After amplification, the specific HLA antigens are determined by gel electrophoresis. HLA genotyping serves an important role in transplantation and disease association studies.
Clinical Disease
Human Immunodeficiency Virus (HIV).
Reference
- Mallal et al. HLA-B*5701 Screening for Hypersensitivity to Abacavir. The New England Journal of Medicine, 358 (6): 568-579, 2008.
Specimen Type
Blood
Collection Instructions
Specimen Collection Criteria
Collect: One Yellow-top ACD tube OR one Pink-top OR two Lavender-top EDTA tube.
Invert several times to mix well.
Physician Office/Draw Specimen Preparation
Do not refrigerate or freeze specimen. Maintain whole blood at room temperature (20-26°C or 68-78.8°F) prior to transport. Transport to the Laboratory within 72 hours of collection.
Preparation for Courier Transport
Transport: Whole blood at room temperature (20-25°C or 68-77°F).
Rejection Criteria
- Unlabeled specimens.
- Specimens drawn in clot, SST, or Sodium Heparin tubes.
In-Lab Processing
Maintain specimen at room temperature (20-26°C or 68-78.8°F) until testing.
Specimen Stability
Specimen Stability for Testing:
Room Temperature (20-26°C or 68-78.8°F): 72 hours
Refrigerated (2-8°C or 36-46°F): Unacceptable
Frozen (-20°C/-4°F or below): Unacceptable
Specimen Storage in Department Prior to Disposal:
Frozen (-80°C): 2 years (DNA)
Test Frequency
As needed.
Results typically available within 5 business days.
Reference Range
Interpretation
By report.
Performing Department
HLA
Performing Department Laboratory Location
Royal Oak HLA Laboratory
Methodology
Polymerase Chain Reaction (PCR).
CPT
81373, 81372
CDM Code
CDM
Epic Test ID
1230102599
LOINC
LOINC: 50956-2
Reviewed Date
Under Review 10/29/2024