Article Text

Download PDFPDF
Answers to Epilogue questions
  1. Vivek Mundada1,
  2. Deepa Krishnakumar1,
  3. Manali Chitre1,
  4. Tilak Das2
  1. 1Department of Paediatric Neurology, Addenbrooke's Hospital, Cambridge, UK
  2. 2Department of Radiology, Addenbrooke's Hospital, Cambridge, UK
  1. Correspondence to Dr Vivek Mundada, Department of Paediatric Neurology, Addenbrookes Hospital, Cambridge CB2 0QQ, UK; v.mundada{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.


Question 1: C

Unenhanced CT examination of the brain revealed extensive thrombosis in the superior sagittal, straight and left transverse sinuses (figure 1). The CT angiogram (figure 2) confirmed venous thrombosis and an arterial infarct. It revealed complete occlusion of left internal carotid artery and segmental vasculopathy, affecting multiple intracranial and extracranial vessels of both the anterior and posterior circulation along with an aneurysmal ascending aorta. The contrast-enhanced CT scan demonstrated a filling defect of the superior sagittal sinus with minimal peripheral contrast enhancement, known as the ‘empty delta sign’.1 It is a useful radiological …

View Full Text


  • Contributors VM has prepared the manuscript of the article with the help of DK and MC. TD has helped in selecting the appropriate images required for this article.

  • Competing interests None declared.

  • Patient consent Obtained.

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