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How to use… white blood cell enzyme assays
  1. James Davison
  1. Correspondence to Dr James Davison, Department of Metabolic Medicine, Great Ormond Street Hospital for Children NHS Foundation Trust, Great Ormond Street, London WC1N 3JH, UK; James.davison{at}


White blood cell (leucocyte) enzyme assays are an important part of the investigation of potential metabolic disorders, in particular, lysosomal storage disorders. It is imperative that appropriate tests are selected, and that knowledge of the limitations of these assays is applied to avoid erroneous conclusions about confirmation or exclusion of diagnoses.

  • Leucocyte enzyme assay.
  • Inherited metabolic disease
  • Lysosomal storage disorders

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  • Competing interests None declared.

  • Provenance and peer review Commissioned; externally peer reviewed.