http://www.fpnotebook.com/

Silhouette Sign

Findings
1. Seen on XRay films
2. Loss of normal border between structures
  1. Different radiodensities form border on XRay
3. Appearance of normally invisible outline
Interpretation
1. Suggests infiltrates, fluids or air
2. False positives
  1. Poor film technique (poor penetration or alignment)
  2. Normal anatomic variants

Navigation Tree

Please see the Terms and Conditions. Please also see the privacy statement regarding advertising on this page. Although access to this page is not restricted, the information found here is intended for use by medical providers. Patients should address specific medical concerns with their physicians.

This page was written by Scott Moses, MD. This page was last revised before 5/10/08, prior to consistent tracking of revision date. This page was last published on 6/1/2008. Please send comments and questions to the editor. Contact information may be found on the page About the Family Practice Notebook. These pages are best viewed with Microsoft Internet Explorer 6.0.