Article info

Download PDFPDF
A hyperdense dot


  1. Correspondence to Dr Shing Ching, Accident and Emergency Department, United Christian Hospital, Kowloon, Hong Kong; aj12029{at}
View Full Text


Ching S, Ting SM
A hyperdense dot

Publication history

  • Accepted August 25, 2015
  • First published June 20, 2016.
Online issue publication 
June 20, 2016

Request permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.