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Thiopurine Methyl Transferase

Referred out for testing

Source Blood
Mnemonic

TPMT

TEST NAME ALERT: Thiopurine Methyl Transferase is not the same test as Thiopurine Metabolites.

Specimen Requirements

1 x 4 mL lavender top EDTA tube

Collect Saturday to Wednesday only.

Extra-regional locations:
Collect Saturday to Tuesday only, to ensure specimens are received by CLS in time for once-a-week shipments to the testing laboratory.

Specimen Handling

DO NOT centrifuge or separate specimen.

DO NOT freeze. Transport whole blood on ice to DSC Referrals. Ensure tube is not in direct contact with ice pack so specimen does not freeze.
Send specimen in a separate bag with a photocopy of the requisition.

DSC Accession:
Store refrigerated.

Additional Information
Testing Location Winnipeg Health Sciences Centre
Testing Frequency
Alternate Name(s) Thiopurine Methyltransferase Phenotyping (RBC), TPMT
Reference Interval