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Pathology Services

6-Thioguanine Nucleotides (6TGN) and 6-Methylmercaptopurine (MMP)

Phlebotomy Requirements

Separate EDTA sample to be taken

Collection

Hospital or GP. All GP & Community samples sent to Ipswich hub. Colchester Acute sent to (COL) Blood Sciences, URGENT Community/Primary Care (NEE) sent in RED sample bag to Colchester Blood Sciences

Sample container

2 x 3.4ml Red EDTA.

Site

Referred St. Thomas’ Hospital,

Notes

Non-fasting. No specific patient preparation required.

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20/11/2025

Sample Delays – Immunology Referrals Oxford

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20/10/2025

Important Update: HLA-B27

HLA-B27 Testing 20th October 2025 Further to communications last month we have continued to experience supply chain issues. We are now changing our methodology to one that requires DNA extraction prior to testing for HLA-B27. Due to this change we will be restricting the tube types that we can receive;  any others received are likely to […]

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