Pulmonary artery intimal sarcoma
Imaging findings
Initial CT shows eccentric soft-tissue thickening in the left lower lobe pulmonary artery (mimicking chronic PE). Follow-up CT shows a massive soft-tissue tumor expanding the vessel and extending into the lung parenchyma.
Key takeaways
Pulmonary artery intimal sarcoma is a rare, highly malignant vascular tumor. It is frequently misdiagnosed as chronic pulmonary embolism due to similar luminal filling defects. Rapid growth and expansion of the vessel wall are key CT features.
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