Superficial Temporal Artery Pseudoaneurysm Following Head Trauma from a Lacrosse Ball: A Case Report

Introduction: Superficial temporal artery pseudoaneurysm is a rare vascular complication of blunt head trauma and may be overlooked due to delayed presentation and minimal initial findings. Case Report: A helmeted adolescent lacrosse player sustained blunt trauma to the right superolateral forehead after being struck by a lacrosse ball. He subsequently developed a progressively enlarging, pulsatile scalp mass. Point-of-care ultrasound demonstrated Doppler flow within the lesion, and further evaluation with ultrasound and computed tomography confirmed a pseudoaneurysm arising from the frontal branch of the superficial temporal artery. The patient underwent surgical excision and ligation of the affected vessel without complications. Conclusion: Early recognition and appropriate imaging are essential for the diagnosis of superficial temporal artery pseudoaneurysm and allow timely surgical management with excellent clinical outcomes.