CTICasesRasmussen Aneurysm in COVID-19 associated Mucormycosis
Imaging findings
CT chest shows a large, cavitating left upper lobe lesion with thick, irregular wall enhancement, local chest wall invasion, and adjacent rib destruction. Within the cavity, CT angiography demonstrates a lobulated pseudoaneurysm (Rasmussen aneurysm) arising from a left pulmonary artery branch.
Key takeaways
Severe, necrotizing pulmonary infections (such as Mucor or Staph complicating COVID-19) can erode adjacent pulmonary arteries, leading to pseudoaneurysm formation within a cavity (Rasmussen aneurysm). These are high-risk lesions that can cause sudden, fatal hemoptysis and require urgent endovascular embolization.
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