Everolimus by Tandem Mass Spectrometry

0092118
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Therapeutic
Ordering Recommendation

Optimize drug therapy and monitor patient adherence.

Mnemonic
EVEROLIMUS
Methodology

Quantitative Liquid Chromatography-Tandem Mass Spectrometry

Performed

Sun-Sat

Reported

Within 24 hours

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation

Pre-dose (trough) levels should be drawn.

Collect

Lavender (EDTA) or pink (K2EDTA).

Specimen Preparation

Transport 1 mL whole blood. (Min: 0.25 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Serum or plasma. Specimens left at room temperature for longer than 24 hours. Clotted specimens.

Remarks
Stability

Ambient: 24 hours; Refrigerated: 2 weeks; Frozen: 2 weeks

Reference Interval

Effective February 18, 2014

Therapeutic Range:
Kidney transplant (in combination with Cyclosporine): 3-8 ng/mL
Liver transplant (in combination with Tacrolimus): 3-8 ng/mL
Toxic value: Greater than 15 ng/mL

Interpretive Data

Everolimus marketed as Zortress is FDA approved for prophylaxis of organ rejection in adult patients receiving a kidney and liver transplant.

Everolimus marketed as Afinitor is FDA approved for the treatment of renal cell carcinoma and for the treatment of subependymal giant cell astrocytoma (SEGA) associated with tuberous sclerosis (TS) in patients who are not candidates for curative surgical resection. The suggested therapeutic range for treatment of SEGA is 5-15 ng/mL, which is based on a predose (trough) specimen.

The optimal therapeutic range for a given patient may differ from this suggested range based on the indication for therapy, treatment phase (initiation or maintenance), use in combination with other drugs, time of specimen collection relative to prior dose, type of transplanted organ, and/or the therapeutic approach of the transplant center.

Compliance Category

Laboratory Developed Test (LDT)

Note

Everolimus (Zortress, Certican, Afinitor) whole blood concentrations can be measured by either chromatographic or immunoassay methodologies.  These two methodologies are not directly interchangeable, and the measured everolimus whole blood concentration depends on the methodology used, and reference ranges may vary according to specific immunoassay or HPLC/MS/MS test. Generally, immunoassays have been reported to have a positive test bias relative to HPLC-MS/MS assays, due to the detection of antibody cross-reactivity with everolimus metabolites.

Hotline History
N/A
CPT Codes

80169

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Components
Component Test Code* Component Chart Name LOINC
0092118 Everolimus by HPLC-MS/MS 50544-6
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Afinitor
  • Certican
  • Everolimus, Blood
  • Zortress
Everolimus by Tandem Mass Spectrometry