Fig. 2
From: The findings of CT and MRI in patients with metanephric adenoma
A 43-year-old male with metanephric adenoma in the upper pole of the right kidney (case 3). Plain CT showed a round, poorly defined isodense mass with a little patchy low-density areas in the renal cortex and medulla and the lesion projected outside of the renal contour. The CT value of the mass was 44 HU (a). Dynamic contrast-enhanced CT revealed a slight enhancement of the tumors in the cortex phase with a CT value of 52 HU (b), a further enhancement in the parenchymal phase with a CT value of 57 HU (c), and a slightly decreased enhancement in the pelvic phase with a CT value of 51 HU (d). Pathology was assessed with hematein-eosin staining and showed that the morphology of tumor cells was uniform with tubular and acinar architecture (magnification, 40 × 10, e). The kidney outline has been marked with red line