Singapore General Hospital will NEVER ask you to transfer money over a call. If in doubt, call the 24/7 ScamShield helpline at 1799, or visit the ScamShield website at www.scamshield.gov.sg.
We’d love to hear from you! Rate the SGH website and share your feedback so we can enhance your online experience and serve you better. Click here to rate us
| Lab Section Category | |
| Indications |
Before starting thiopurine therapy to identify individuals at high risk for toxicity.During thiopurine therapy for patients experiencing severe myelosuppression or neutropenia |
| Specimen Required |
5 mL of blood in EDTA (lavender top) tube. |
| Storage/Transport |
Refrigerate sample at 2-8°C until transfer to laboratory. Do not freeze. Sample should reach the laboratory as soon as possible preferably within 6 hours after collection. |
| Method |
TPMT and NUDT15 Genotyping PCR |
| Turnaround Time |
1-8 calendar days |
| Day(s) Test Set up |
Wednesdays (except public holidays) |
Last Updated - 22 Dec 2025
Stay Healthy With
© 2025 SingHealth Group. All Rights Reserved.