[A man with a bump on his forehead after a fall]. / Een man met een bult op zijn voorhoofd na een val.

UNLABELLED: An 84-year-old male patient presented with a swelling on his forehead which had developed gradually over a period of three weeks after a fall. Ultrasound examination revealed a complex fluid collection with a yin-yang flow pattern (revealed by colour Doppler imaging), which was suggestive of a pseudoaneurysm of the frontal branch of the superficial temporal artery. This was successfully treated with an injection of thrombin. DIAGNOSIS: traumatic pseudoaneurysm of the superficial temporal artery.