PMC6886629_01
Computed tomography (CT) chest angiogram 2 days after presentation showing a mass within the right main pulmonary artery (arrows).
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A computed tomography (CT) chest angiogram was performed which revealed a 5.7 x 4.2 x 5.0 cm mass in the right pulmonary artery; no enlarged lymph nodes or signs of metastasis were found (Fig. 1).
Computed tomography (CT) chest angiogram 2 weeks later showing no improvement in the mass localised within the right pulmonary artery (arrows).
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A follow-up CT chest angiogram was carried out 2 weeks later, which showed no improvement; however, a new finding of 1.5 cm pleural fluid in the right lung was discovered (Fig. 2).
Magnetic resonance imaging (MRI) chest scan showing multiple filling defects in the right main pulmonary artery (arrows).
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A decision was made to proceed further with magnetic resonance imaging (MRI) of the chest which revealed increasing pleural fluid with intraluminal filling defects involving the right pulmonary artery, citing pulmonary thromboembolism as the main differential diagnosis (Fig. 3).
Positron emission tomography (PET-CT) scan showing fluorodeoxyglucose (FDG) uptake in the mass in the right main pulmonary artery (arrows) with precise FDG uptake measurements.
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A PET-CT scan was performed after a multidisciplinary conference, which revealed a large invasive obstructing homogenous mass in the right pulmonary artery with high fluorodeoxyglucose (FDG) uptake of 25.2 SUV max, no FDG uptake in mediastinal lymph nodes or other organs; the differential diagnoses included pulmonary thromboembolism and an intrapulmonary artery tumour (Fig. 4).