Article Text

Download PDFPDF
Hyperattenuating ring sign
  1. Kotaro Kunitomo,
  2. Chihiro Yamashita,
  3. Yuki Koga
  1. Department of Internal Medicine, Aso Medical Center, Kumamoto, Japan
  1. Correspondence to Dr Kotaro Kunitomo, Department of Internal Medicine, Aso Medical Center, Kumamoto 869-2225, Japan; m05035kk{at}

Statistics from

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.

Clinical introduction

A 39-year-old man with no medical history complained of right flank pain that developed 1 day prior. He reported no history of sexual activity or of travelling abroad for the past 6 months. His temperature was 38.0°C, his BP was 144/87 mm Hg and his pulse was 119 per minute. Physical examination revealed tenderness in the right flank, with no rebound tenderness. Laboratory evaluation revealed elevated white blood cell count of 12.9×109/L (neutrophils: 67.8%). A right upper quadrant ultrasound …

View Full Text


  • Contributors KK and YK identified the significance of the case. KK and CY wrote the manuscript, and YK revised it. All authors approved the final version of the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Obtained.

  • Provenance and peer review Not commissioned; internally peer reviewed.