Fig. 1
From: The findings of CT and MRI in patients with metanephric adenoma
A 28-year-old female with metanephric adenoma in the mid and lower poles of the right kidney (case 4). Plain CT showed a round homogeneous isodense mass with a poorly defined margin in the renal medulla. The CT value of the mass was 41 HU (a). Dynamic contrast-enhanced CT revealed a progressive enhancement in the cortex phase (b), parenchymal phase (c), and pelvic phase (d). The CT values of all three phases, respectively, were 51 HU, 58 HU, and 70 HU, lower than that of the normal renal parenchyma. 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)