Fig. 17From: The needle and the damage done: musculoskeletal and vascular complications associated with injected drug useDuplex ultrasound image demonstrating a left groin pseudoaneurysm due to injected drug use. Yin-yang sign indicating turbulent pulsatile blood flow is seen within the pseudoaneurysm. The likely site of the neck communicating with the adjacent artery is also demonstrated (red arrow)Back to article page