Molecular Pathology

MMR (Mismatch Repair)

Turnaround Time

7-10 days

General Information

We are a reference centre for Mismatch repair (MMR) protein expression analysis in patients suspected to have Lynch syndrome; we test over 700 cases a year. immunohistochemical testing allows identification of patients without normal DNA repair processes, who are therefore more likely to have Lynch syndrome. In patients with MLH1 loss we can also perform reflex testing for BRAF V600E mutations and MLH1 promoter methylation status. Mismatch repair protein expression is also requested increasingly to help inform patient chemotherapy decisions, as patients lacking MMR expression appear to have reduced sensitivity to certain cytotoxic treatments.

What to send:

  • Paraffin block from biopsy, resection or cell block
  • Unstained mounted sections at 3μm on coated/charged slides

Please note tissue handling, tissue fixation, time between cutting and staining and excessive drying can lead to loss of expression. Fixatives containing alcohol should not be used and use of Bouin’s fixative will preclude testing by FISH methods.

A copy of the original Pathology report where possible.

MMR Request Form

Specifications

  • EQA Status: NEQAS

Creation Date

Tuesday, 23 July 2019

Modification Date

Tuesday, 23 July 2019

General Information

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Location of Laboratories

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Copyright UHB Pathology 2018

Protection of Personal Information – Clinical Laboratory Services comply with the Trust Data Protection Policy and have procedures in place to allow the Directorate and it’s employees to comply with the Data Protection Act 1998 and associated best practice and guidance.

University Hospitals Birmingham medical laboratories at Queen Elizabeth Hospital, Heartlands Hospital, Good Hope Hospital and Solihull Hospital are UKAS (United Kingdom Accreditation Service) accredited to the ISO 15189:2012 standard. For a list of accredited tests and other information please visit the UKAS website using the following link: https://www.ukas.com/find-an-organisation/

  • Molecular Pathology is a UKAS accredited medical laboratory No. 8759
  • Biochemistry is a UKAS accredited medical laboratory No. 8910
  • Haematology and Transfusion is a UKAS accredited medical laboratory No. 8784
  • Clinical Microbiology is a UKAS accredited medical laboratory No. 8760
  • Cellular Pathology is a UKAS accredited medical laboratory No. 10141
  • Musculoskeletal laboratory is a UKAS accredited medical laboratory No. 9897
  • Heartlands, Good Hope and Solihull Hospital pathology laboratories are a UKAS accredited medical laboratory No.8217.

Tests not appearing on the UKAS Schedule of Accreditation currently remain outside of our scope of accreditation. However, these tests have been validated to the same high standard as accredited tests and are performed by the same trained and competent staff.

For further test information, please visit the test database: http://qehbpathology.uk/test-database

For further information contact Louise Fallon, Quality Manager, 0121 371 5962