PMC8632717_01
The left innominate vein aneurysm. (A) Contrast-enhanced CT of the chest showed a 4.8 x 4.6 cm anterior mediastinal mass with significant homogenous enhancement after injection of the contrast; (B) Intraoperative view of the root of the aneurysm after dividing the left internal thoracic vein with a vascular clamp; (C) Gross appearance of the aneurysm; (D) Gross appearance of the cut-up aneurysm after the blood being flowed away; (E) Postoperative pathology confirmed the diagnosis of the left innominate vein aneurysm; (F) Chest radiography on postoperative day 1 showed complete reexpansion of the lung, with no obvious pneumothorax or hydrothorax.
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F1
Contrast-enhanced computerized tomography (CT) of the chest showed a 4.8 x 4.6 cm anterior mediastinal mass with significant homogenous enhancement after injection of the contrast (mean CT values before and after contrast injection were 38 and 115 HU, respectively), suggesting a diagnosis of Castleman's disease, but not excluding thymoma (Figure 1).