Multimodal treatment and imaging of primary pulmonary artery sarcoma: a case report.

Primary pulmonary artery sarcoma (PAS) is a malignant neoplasm of the pulmonary vascular system originating from the intima, with clinical and imaging manifestations similar to those of pulmonary thromboembolism (PTE), and is often misdiagnosed. Spectral CT and PET/CT can clearly show the extent and metastasis of PAS and are valuable in visualizing adjacent structures such as lungs, bronchi, and mediastinum, providing a strong imaging basis for the diagnosis and differentiation of PAS, allowing treatment monitoring and follow-up.