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Fig. 5 | BMC Veterinary Research

Fig. 5

From: Vasoproliferative process resembling pulmonary capillary hemangiomatosis in a cat

Fig. 5

Pulmonary arterial enlargement and thromboembolism in a 15-year-old cat with pulmonary capillary hemangiomatosis. a-d Transverse post-contrast CT images extending from the level of the pulmonary trunk to the level of T9. a The pulmonary trunk (PT) is enlarged displacing the aorta (Ao) to the right. The pulmonary trunk as well as the left (LPa) and right (RPa) pulmonary arteries are filled with iodinated contrast medium. b After their entry into the hilus of the lungs and division of the first branches, the right and left pulmonary arteries now becoming the caudal lobar pulmonary arteries (LCPa, RCPa) still present good filling of the entire lumen of the arteries with contrast medium. c After giving off a branch to the caudal segment of the left cranial lung lobe, the left caudal lobar pulmonary artery (LCPa) presents a large filling defect (*) encompassing the entire lumen of the vessel while no filling defect is identified in the right caudal lobar pulmonary artery (RCPa) at this level (8th thoracic vertebra). d After giving off a branch to the ventral aspect of the right caudal lung lobe, a large filling defect (*) involving the entire lumen of the RCPa is seen. e Dorsal projection of the heart and great vessels obtained using a three-dimensional (3D) volume rendering application tool of the CT workstation based on volume data from the post-contrast arterial phase. The lack of enhancement due to the absence of contrast medium first in the LCPa followed approximately 1 cm caudally by the right (RCPa) resulted in an abrupt termination of those vessels instead of a normal tapering towards the periphery of the lung lobes. Horizontal (f) and sagittal (G-H) post-contrast 3D Maximum Intensity Projection images of the left (g) and right (h) caudal lobar pulmonary arteries illustrating the location of the filling defects in relation to the longitudinal path of these vessels. On the left side, the artery (LCPa) abruptly lacks contrast enhancement (*) starting between the 6th (Rib6) and 7th ribs (Rib7) and throughout the caudal extent of the vessel. On the right side, the lack of contrast enhancement in the artery starts just caudal to the 7th rib and over a length of 4 mm, a filling defect (*) encompassing the entire lumen and throughout the remainder of the artery is illustrated

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