BMJ 2010; 340 doi: http://dx.doi.org/10.1136/bmj.c571 (Published 02 February 2010) Cite this as: BMJ 2010;340:c571
  1. Rosalind C Simpson, ST4 dermatology,
  2. Robert Burd, consultant dermatologist
  1. 1University Hospitals Leicester NHS Trust, Leicester Royal Infirmary, Leicester LE1 5WW
  1. rozgait{at}doctors.org.uk

    A 14 year old boy presented with an asymptomatic bruise-like lesion on his left thigh. Examination …

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