Poor film technique (poor penetration or alignment)
Normal anatomic variants
Images: Related links to external sites (from Bing)
These images are a random sampling from a Bing search on the term "Silhouette Sign." Click on the image (or right click) to open the source website in a new browser window. Search Bing for all related images
FPnotebook.com is a rapid access, point-of-care medical reference for primary care and emergency clinicians. Started in 1995, this collection now contains 7002 interlinked topic pages divided into a tree of 31 specialty books and 737 chapters. Content is updated monthly with systematic literature reviews and conferences.
Although access to this website 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, last revised on 10/21/2007 and last published on 11/5/2021.