Mondor's disease is a rare benign and self-limiting condition characterized by 
thrombophlebitis of the superficial veins of the anterolateral thoracoabdominal 
wall. We describe a case of Mondor's disease of the breast as a complication of 
an ultrasound-guided core needle biospy. The patient presented with a palpable 
cord-like structure in her left breast, associated with severe pain and 
tenderness. She was treated concervatively and complete resolution was observed 
after four weeks. We conclude that emergency clinicians and interventional 
breast radiologists should be aware of Mondor's disease as a potential 
complication of ultrasound-guided core needle biopsy of the breast.