Traumatic Supratrochlear Artery Pseudoaneurysm With Spontaneous Resolution

Background: Traumatic pseudoaneurysm of the supratrochlear artery is a rare lesion. It manifests, as a painless mass, in the frontal region following trauma. The unusual incidence and confusing presentation require the clinicians to thoroughly understand its presentation and diagnosis. Diagnosis is typically made on history and physical examination, but it can be confirmed by duplex ultrasound. Definitive treatment is surgical resection of the aneurysm after proximal and distal ligation of the vessel. However, in some cases, follow-up is recommended because there is a possibility of spontaneous relapse. Case Presentation: We present a case of traumatic pseudoaneurysm of the supratrochlear artery, which developed a few weeks after blunt trauma to the forehead. The radiologist reported a pseudoaneurysm originating with a narrow stalk of the supratrochlear artery. In the patient’s followup after three months, the patient’s mass became very small, and in the follow-up after five months, the mass completely disappeared. Conclusion: Pulsatile and or soft-tissue masses that are continuous with an artery with a history of trauma should be considered pseudoaneurysm. Color Doppler sonography is a convenient and noninvasive modality in diagnosis. If the pseudoaneurysm of the supratrochlear artery is small and contains thrombosis, waiting and seeing might be an effective option.