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TCR Spectratyping, B
Test Code39803
CPT Codes
81340<br>Restricted Client Code
Preferred Specimen
Adults: 10 mL whole blood collected in an EDTA (pink-top) tube
Pediatrics (>1 year): 3 mL whole blood collected in EDTA (lavender-top or pink-top) tube
Pediatrics (< or = 1 year): 1 mL whole blood collected in EDTA (lavender-top or pink-top) tube
Pediatrics (>1 year): 3 mL whole blood collected in EDTA (lavender-top or pink-top) tube
Pediatrics (< or = 1 year): 1 mL whole blood collected in EDTA (lavender-top or pink-top) tube
Minimum Volume
Adults: 5 mL
Pediatrics (>1 year): 3 mL
Pediatrics (< or = 1 year): 1 mL
Pediatrics (>1 year): 3 mL
Pediatrics (< or = 1 year): 1 mL
Instructions
Send specimen in original tube
Specimens are required to be received in the laboratory weekdays and by 4 p.m. on Friday. Draw and package specimen as close to shipping time as possible.
It is recommended that specimens arrive within 24 hours of draw.
Samples arriving on the weekend and observed holidays may be canceled.
Ordering physician's name and phone number are required.
For serial monitoring, it is recommended to perform specimen collection at the same time of day, if possible.
Mayo Laboratory Director/Consultant approval is required prior to ordering this test in patients >40 years of age.
Specimens are required to be received in the laboratory weekdays and by 4 p.m. on Friday. Draw and package specimen as close to shipping time as possible.
It is recommended that specimens arrive within 24 hours of draw.
Samples arriving on the weekend and observed holidays may be canceled.
Ordering physician's name and phone number are required.
For serial monitoring, it is recommended to perform specimen collection at the same time of day, if possible.
Mayo Laboratory Director/Consultant approval is required prior to ordering this test in patients >40 years of age.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 48 hours
Refrigerated: Unacceptable
Frozen: Unacceptable
Refrigerated: Unacceptable
Frozen: Unacceptable
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Clotted
Methodology
Molecular TCR Vb-CDR3 Fragment Length Analysis
FDA Status
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.
Setup Schedule
Set up: Varies; Report available: 10-14 days
Reference Range
See Laboratory Report
Clinical Significance
Assessment of T-cell receptor diversity in various clinical contexts including primary immunodeficiencies, monitoring immune reconstitution posthematopoietic cell transplantation, and temporal assessment of repertoire changes in autoimmune diseases and viral infections
