Case report: Retrogenicular popliteal artery pseudoaneurysm following trivial knee hyperextension.

Introduction: Popliteal artery pseudoaneurysm is rare after blunt trauma without associated bone fracture, usually presenting in a delayed fashion. We present a case of early presentation following minor civilian trauma.

Case presentation: A 66-year-old man presented with left leg pain and swelling after a trivial knee hyperextension injury. Ultrasound revealed a popliteal artery pseudoaneurysm, confirmed by CT angiogram. Open surgical repair with interposition graft was successful. Intraoperatively, a 3 cm linear laceration in the retrogenicular popliteal artery and ipsilateral hamstring tear were noted.

Discussion: Delayed presentation is typical, making early detection challenging. Our case emphasizes maintaining suspicion for popliteal artery pseudoaneurysm, especially after trivial knee injuries. Prompt imaging and intervention are crucial to mitigate potential complications.

Conclusion: Popliteal artery pseudoaneurysm from minor knee trauma is rare but should be considered in patients with leg pain and swelling. Early detection and surgical intervention are vital to prevent complications.