Atypical haemolytic uraemic syndrome

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Inclusion criteria:

  • Renal biopsy showing a thrombotic microangiopathy, OR
  • the classic triad of microangiopathic haemolytic anaemia, thrombocytopenia, renal failure

Exclusion criteria:

  • Shiga toxin associated HUS
  • Secondary causes – drugs, infection (HIV, Streptococcus pneumonia), transplantation (bone marrow, liver, lung, cardiac but not de-novo renal), cobalamin deficiency, SLE, APL Ab syndrome, scleroderma
  • ADAMTS13 activity <10% or anti-ADAMTS13 autoantibodies

Prior genetic testing guidance

  • Results should have been reviewed for all genetic tests undertaken, including disease-relevant genes in exome sequencing data. The patient is not eligible if they have a molecular diagnosis for their condition.
  • Genetic testing should continue according to routine local practice for this phenotype regardless of recruitment to the project; results of these tests must be submitted via the ‘Genetic investigations’ section of the data capture tool to allow comparison of WGS with current standard testing.

PLEASE NOTE: The sensitivity of WGS compared to current diagnostic genetic testing has not yet been established. It is therefore important that tests which are clinically indicated under local standard practice continue to be carried out.

Prior genetic testing genes 

Testing of the following genes should be carried out PRIOR TO RECRUITMENT where this is in line with current local practice:

  • CFH, CFI, CD46

Closing statement 

These requirements will be kept under continual review during the main programme and may be subject to change.

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