• James Johnston and Carl Mark Sullivan.
• Interventional Radiology Department, Morriston Hospital, Swansea, UK.
• BMJ Case Rep. 2018 Mar 23; 2018.

AbstractA 68-year-old man presented with rapid swelling of the right forehead 11 days after sustaining a laceration secondary to a fall. Presumed to be an abscess due to retained foreign body, needle aspiration was performed and arterial blood obtained. Doppler ultrasound revealed a 3 cm mixed echogenicity lesion with 'see-sawing' internal Doppler flow arising from the superficial temporal artery (STA), in keeping with a pseudoaneurysm. Treatment options including interventional radiology and open surgery were considered. Open operative intervention with direct surgical ligation provided an excellent outcome. Delayed pseudoaneurysm of the STA is a rare complication of trauma but should be considered in the differential of a traumatic lateral forehead swelling to prevent complications and inappropriate investigations and management.© BMJ Publishing Group Ltd (unless otherwise stated in the text of the article) 2018. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

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