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Test Name:THIOPURINE METHYLTRANSFERASE, RBC
Test Number:5636/TPM
Collect:5 ml Whole Blood
Peds Collect:5.0 ml Whole Blood
Alternate Collect:NONE
Container:Heparin - Green Top Tube
Processing:Do Not Spin
Transport/Stability:Refrigerated; Ambient: NO; Frozen: NO
Alternate Names:TPMT
Performing Lab:Mayo Medical Labs (80291)
Days Set Up:M, W - F
Expected TAT:2 - 3 Days
Ref. Ranges:>17.0 U/ml RBC (Normal)
Collection/
Processing Details:
Must arrive at Mayo within 72 hours of Draw.* Specimen CANNOT be frozen. NO PST tubes. Used for detection of individuals with low TPMT who will have excessive myelosuppression when taking azathioprine (Imuran) and 6-MP Purinethol.
Method:LC-MS/MS
CPT Codes:83789-90
Date Created:01/22/2003
Revised Date:05/08/2009

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