Rare Solitary Fibrous Tumor in the Pulmonary Artery Mimicking Pulmonary Embolism
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- angiography, digital subtraction
- perfusion imaging
- pulmonary artery
- pulmonary embolism
- venous thrombosis
A 68-year-old woman suspected with pulmonary artery embolism (PE) who presented with increasingly aggravated oppression in chest for half a year underwent computed tomographic pulmonary angiography, and smooth filling defects were found in the main pulmonary artery. The patient had no predisposing factors of PE or deep venous thrombosis. Physical examination showed no significant abnormality, including vital signs and cardiac auscultation. The majority of biochemical assays were normal, except for increased D-dimer in the serum (1.49 µg/mL, reference values <0.5) and neuron-specific enolase (24.23 ng/mL, reference values <16.3).
For further validation of PE and predisposing factors, such as deep venous thrombosis, 99mTc-macroaggregated albumin deep venous imaging and lung perfusion imaging were performed. Diffusely decreased macroaggregated albumin uptake was observed in the left lung. No significant abnormality was found in deep veins of lower limb (Figure 1). Because of progressive disease and increasing symptoms not consistent with acute onset of PE, a mass in the pulmonary artery was suspected. 99mTc-labeled peptides arginine-glycine-aspartic acid (RGD) single-photon emission computed tomography/computed tomography has been documented in the diagnosis of malignant …