Thymidine Determination, Plasma
Test Mnemonic
PLTHY
CPT Codes
- 83789 - QTY (1)
Performing Laboratory
Baylor Miraca Genetics Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 2 mL | Plasma | Sodium heparin (Green) | Frozen, ASAP | Separate plasma from cells ASAP and transfer to standard aliquot tube and freeze. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | Unacceptable |
| Refrigerated | Unacceptable |
| Frozen | 7 days |
Days Performed
Mon - Sat
Turnaround Time
4 - 16 days
Methodology
| Name | Description |
|---|---|
| Tandem Mass Spectroscopy |
Special Info
Test requisition is required to be sent with the sample. Separate plasma from cells ASAP and freeze.
Clinical Info
This test provides quantitative analysis of thymidine in plasma. It is useful for evaluation of patients suspected of Mitochondrial neurogastrointestinal encephalomyopathy (MNGIE). MNGIE is an autosomal recessive disorder caused by mutations in the gene encoding thymidine phosphorylase (TP). The disease is characterized clinically by impaired eye movements, gastrointestinal dysmotility, cachexia, peripheral neuropathy, myopathy and leukoencephalopathy.