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Towards evidence based medicine for paediatricians
  1. Bob Phillips
  1. Correspondence to Dr Bob Phillips, Centre for Reviews and Dissemination, University of York, York YO10 5DD, UK; bob.phillips{at}doctors.org.uk

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When a test isn't a test

There are many reasons why we request tests, in medicine. One imaginary patient's journey picks up a number of them.

Take a patient who presents with a painless lump on their arm, who's tired and a bit pale and washed out. You might send a series of blood tests, including a full blood count to diagnose anaemia. You may also request an ultrasound of the lump, which may show an ugly mass with features consistent with sarcoma. Your …

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