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Solitary peripheral pulmonary artery aneurysm.

Figure 2: Intraoperative view. The main right pulmonary artery dissected proximally and distally to expose the lesion (A). The opened aneurysm (B). Three segmental arteries arising from the aneurysmal sac (arrows). Surgical ties placed around the main pulmonary artery proximal and distal to the aneurysm and around the segmental branches. RUL: right upper lobe; VCS: vena cave superior; RPA: right pulmonary artery.