CTICasesMycotic Pseudoaneurysm from Deep Neck Infection
Imaging findings
Serial neck and chest CTs in a patient treated for a deep neck/manubrial joint infection show the infection tracking down into the upper mediastinum, with progressive periaortic soft-tissue fluid, gas, and pericardial enhancement adjacent to the aortic arch. Over the course of just two days, a new outpouching develops from the aortic wall in the same region.
Key takeaways
A deep neck infection that extends into the mediastinum can seed the adjacent aortic wall and produce a mycotic pseudoaneurysm within days, so periaortic inflammatory change or gas on interval imaging after a neck infection warrants close short-term follow-up for a developing pseudoaneurysm.
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