Cytochrome P450 2D6 (CYP2D6) Comprehensive Cascade
| Abbrev Code: | MMMISC | ||
| Order Code: | LAB4909 | Order Name: | Laboratory Miscellaneous Order |
| Methodology: | Polymerase chain reaction (PCR)/DNA sequencing | ||
| CPT Codes: | 0070U x1 | ||
| Turnaround Time: | Specimens are sent to reference laboratory Mon-Fri; results are reported within 3-16 days. | ||
| Special Instructions: | Transfusions will interfere with testing for up to 4-6 weeks. DNA obtained from white cells may not provide useful information for patients who received a recent transfusion of blood that was not leukocyte-reduced. Wait 4-6 weeks until transfused cells have left the patient's circulation before drawing the patient's blood specimen for genotype testing. A signed informed consent in the patient's medical record is required; the consent form should not be sent to the laboratory. See Associated Links. | ||
| Compliance: | This test was developed and its performance characteristics determined by Laboratory Medicine and Pathology, Mayo Clinic. This test has not been cleared by the U.S. Food and Drug Administration. |
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| Associated Links: | |||
Collection Instructions
| Specimen: | Blood |
| Optimal Volume: | 3 mL |
| Minimum\Peds Volume: | 1 mL |
| Container: | Purple (EDTA) |
Processing and Shipping
| Specimen Processing: | Whole blood. Do not process. Store at room temperature. |
| Shipping Instructions: | Ship in original container at room temperature. |
| Stability: | 9 days at room temperature (preferred); 30 days refrigerated. |
| Test Performed at or Referral Lab | Lab Sendouts (Mayo Medical Laboratories) |
| Referral Lab number: | 2D6CV |
Interpretive
| Reference Range: | By report. |
| Use: | Providing information relevant to tamoxifen, psychotropic medications (such as fluoxetine, nortriptyline, paroxetine and pimozide) codeine, and tramadol as well as other medications metabolized by CYP2D6. Determining the exact genotype when other methods fail to generate this information or if genotype-phenotype discord is encountered clinically. Identifying novel mutations that may interfere with drug metabolism. |
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