PMC3087470_01
Ultrasonography (US) shows a hypoechoic solid mass in left adrenal location in longitudinal view (white arrows) (a). In transverse images, US demonstrates retroaortic left renal vein (RLRV) (blue arrows), originating from left renal hilus, passing posteriorly to the abdominal aorta (red arrow) and anteriorly to the vertebral corpus, and joining inferior vena cava (white arrowhead) (b). Color Doppler demonstrates RLRV (blue arrows) (c).
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As an incidental finding, a venous structure, originating from the left renal hilus, passing posteriorly to the abdominal aorta, and draining to the inferior vena cava was demonstrated and evaluated as RLRV (Figures 1(a), 1(b), 1(c)).
Axial contrast-enhanced computed tomography (CT) images revealed hypodense mass measuring 3.5 x 3 cm within the left adrenal gland (white arrows). The density of the mass was +14 HU after 65 seconds following contrast administration (a). RLRV (black arrows) passing posteriorly to the abdominal aorta (red arrow), joining inferior vena cava (blue arrow), was also depicted (b).
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RLRV was depicted with CT (Figures 2(a), 2(b)).
In axial magnetic resonance (MR) imaging, in-phase (a) and out-of-phase (b) images demonstrate a prominent signal loss in the adrenal mass (black arrows) as we take the intensity of the spleen (S) as an internal standard. MR spectroscopy (c) revealed the presence of high lipid content in the left adrenal mass (white arrow). All these findings were consistent with adrenal adenoma.
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In MRI, in-phase, out-of-phase images and MRS revealed the presence of lipid in the left adrenal mass, which was consistent with adrenal adenoma (Figures 3(a), 3(b), 3(c)).