PMC9619138_01
Contrast-enhanced computed tomography (CT) before transcatheter embolization. (A) Contrast-enhanced CT showed a 0.9 x 0.7 cm aneurysmal dilatation in the right pulmonary lower lobe (arrow). (B) Volume rendered image in 15-degree left anterior oblique view showing aneurysm dilatation connecting to the A10b/c bifurcation (arrow).
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Contrast-enhanced CT showed a 0.9 x 0.7 cm aneurysmal dilation adjacent to the right pulmonary artery A10b/c bifurcation without a distinct draining vein (Fig. 1).
Angiographic images obtained during the procedure. (A) Digital subtraction angiography under balloon occlusion from the right A10b+c showing a pulmonary artery aneurysm at the A10b/c bifurcation. (B) Fluoroscopy showing coils in A10b, A10c, aneurysm, and A10b+c after embolization. (C) Right inferior pulmonary artery angiography after embolization showing disappearance of the aneurysm and absence of nontargeted embolization.
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A10b/c bifurcation and no early venous return, leading to the PAA diagnosis (Fig. 2A). A10b and A10c distal to the PAA, the PAA, and A10b+c proximal to the PAA were embolized with hydrogel coils (AZUR CX18; Terumo, Tokyo, Japan) and pushable coils (C-STOPPER 0.016''; Piolax Medical Devices, Kanagawa, Japan) using a 2.5-F microcatheter (Renegade; Boston Scientific, MA) under flow control by balloon dilation (Fig. 2B). After embolization, right inferior pulmonary artery angiography revealed the disappearance of the PAA and absence of non-targeted embolization (Fig. 2C).
Contrast-enhanced magnetic resonance imaging three months after embolization. Recanalization of the aneurysm was not observed.
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Contrast-enhanced magnetic resonance imaging performed 3 months after embolization showed no recanalization of the PAA (Fig. 3).