PMC4897088_01
41-year-old woman with chronic pulmonary embolism. Axial CT image of the chest demonstrating a mass extending outside the vessel wall with a large filling defect involving the left main pulmonary artery and extending into all sub-branches.
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Nonetheless, a CT scan of the chest using a protocol to evaluate for a pulmonary embolism was performed which was remarkable for a large filling defect involving the left main pulmonary artery and extending into all sub-branches, most pronounced in the left lower lobe (Figure 1A, Figure 1B, Figure 1C).