PMC5099265_01
Pulmonary vein aneurysm. Computed tomography image showed a 1.5 cm homogenously enhancing nodule closely related to the right inferior pulmonary vein on (A) coronal and (B) axial view. (C) Magnetic resonance angiography revealed a vascular lesion interposed between a branch of the right inferior pulmonary vein and the posterior basal segmental branch of the right lower lobe pulmonary artery, which could represent pulmonary arteriovenous malformation or a saccular aneurysm. (D) Diagnostic angiography of the right pulmonary artery showed 1.5 cm dilation within right lower lobe pulmonary vein corresponding to the lesions on CT and MRA. No arterial aneurysm or arteriovenous malformation was present.
gr1.jpg
PMC5099265_01_gr1.jpg
fig1
A computed tomograph (CT) of the chest with contrast showed a homogenously enhancing 1.5 cm nodule in the right infrahilar region, closely related to the right inferior pulmonary vein (Fig. 1A-B). Magnetic resonance angiography (MRA) revealed that it was a vascular lesion interposed between a small branch of the right inferior pulmonary vein and posterior basal segmental branch of right lower lobe pulmonary artery, suspicious for arteriovenous malformation or venous aneurysm (Fig. 1C). Radiology with a plan for angioembolization if it were revealed to be an arteriovenous malformation. Right pulmonary arteriography showed a 1.5 cm dilation within the right lower lobe vein with no communication with the pulmonary artery (Fig. 1D), so embolization was not indicated.