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Thiopurine Methyltransferase (TPMT)

About This Test

Department: Biochemistry (referred)


  • EDTA (purple top)

Dedicated sample required


Turnaround Time:

6 - 8 weeks


Evaluation of TPMT status prior to prescribing azathioprine. Both TPMT activity and genetic analysis are performed by the referral laboratory.

Please note: repeat requests will not be analysed - if a sample has already been sent for analysis, please await results. Please contact the laboratory if a result has not been received.

Other Comments:

Analysed at Birmingham Heartlands Hospital, Bordesley Green East, Birmingham, B9 5SS

Interpretive comments provided by referral laboratory.