PMC2782168_01
PA chest roentgenogram shows well-defined, paratracheal mass of about 7 cm in the upper zone of the right hemithorax.
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F1
Chest radiograph (CXR) demonstrated a superior mediastinal mass (Fig. 1).
Contrast enhanced computed tomography (CT) demonstrates a 7 cm sized proximal right subclavian artery aneurysm and intraluminal yin-yang appearance due to thrombus.
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F2
Computed tomography (CT) and magnetic resonance imaging (MRI) demonstrated a 7 cm sized proximal right subclavian artery aneurysm (Fig. 2, 3).
Reconstructed three-dimensional magnetic resonance imaging (MRI) demonstrated positional relationships between right subclavian artery aneurysm and surrounding vessel.
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F3
Computed tomography (CT) and magnetic resonance imaging (MRI) demonstrated a 7 cm sized proximal right subclavian artery aneurysm (Fig. 2, 3).
Preoperative digital subtraction angiography of mass revealing an saccular aneurysm of right subclavian artery with afferent and efferent loop and intraluminal filling defects.
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F4
Thoracic and subclavian aortography revealed a tortuous right subclavian arterial anatomy with a saccular aneurysm beginning near the subclavian origin (Fig. 4).
(A) Microscopically, atheromatous plaque contains amorphous pink material with slit-like "cholesterol clefts" of lipid material and calcification. There is recent hemorrhage on right side (H&E stain, x20). (B) At higher magnification, many foam cells and a cholesterol cleft are seen (H&E stain, x200).
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F5
Pathology was consistent with an atherosclerotic aneurysm filled with thrombus (Fig. 5).