1. Progressive Foot Swelling and Pain
R. Jason Thurman, MD, Ashley R. Brown, MD, Robinson M. Ferre, MD 
Annals of Emergency Medicine 
Volume 59, Issue 6, (June 2012)
DOI: /j.annemergmed
Copyright © 2012 American College of Emergency Physicians Terms and Conditions

2. Figure 1 Lateral view of the patient's right foot mass.
Annals of Emergency Medicine  , DOI: ( /j.annemergmed )
Copyright © 2012 American College of Emergency Physicians Terms and Conditions

3. Figure 2
Color Doppler ultrasonographic evaluation of the dorsal foot lesion.
Annals of Emergency Medicine  , DOI: ( /j.annemergmed )
Copyright © 2012 American College of Emergency Physicians Terms and Conditions

4. Figure 3
Swirling of blood flow within the foot lesion, demonstrating the sonographic ”yin-yang sign.”
Used with permission of R. Jason Thurman, MD, Department of Emergency Medicine, Vanderbilt University Medical Center, Nashville, TN.
Annals of Emergency Medicine  , DOI: ( /j.annemergmed )
Copyright © 2012 American College of Emergency Physicians Terms and Conditions