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HelpTest Code TTRX Amyloidosis, Transthyretin-Associated Familial, Reflex, Blood
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| TTRZ | TTR Gene, Full Gene Analysis | Yes | No |
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Whole bloodShipping Instructions
Specimen must arrive within 4 days of collection. Specimens are stabilized upon receipt and stored until testing is performed.
Specimen Required
Container/Tube:
Preferred: Lavender top (EDTA)
Acceptable: Yellow top (ACD)
Specimen Volume: 3 mL
Collection Instructions:
1. Invert several times to mix blood.
2. Send whole blood specimen in original tube. Do not aliquot.
Specimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Whole blood | Refrigerated (preferred) | 4 days | |
| Ambient | 4 days |
Reference Values
An interpretive report will be provided.
Day(s) Performed
Tuesday
CPT Code Information
82542
81404 (if appropriate)
Genetics Test Information
Mass spectrometry to evaluate transthyretin (TTR) protein structure is performed first. In all cases demonstrating a structural change, the TTR gene will be further analyzed by DNA sequence analysis. If no alterations are detected, the reflex full gene analysis will not be performed unless a specific request for TTRZ / TTR Gene, Full Gene Analysis, Varies is submitted by the ordering physician or client.
Report Available
3 to 9 daysSpecimen Retention Time
2 monthsReject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | OK |