PMC9339632_01
(A) Computed tomograph (CT) Arterial period abnormal density shadows were seen in the middle and upper poles of the right kidney, with flaky low-density areas inside and annular enhancement at the edges (the red arrow). (B) Coronal view the abnormal density shadow in the upper pole of the right kidney. (C) Magnetic resonance (MRI) mass in the upper pole of the right kidney with inhomogeneous signal, unclear boundary, scattered lacunae, delayed inhomogeneous enhancement after enhancement, and thickening of perirenal fascia.
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In terms of imaging examination, contrast-enhanced CT revealed heterogeneous density of the upper pole of the right kidney, with slightly enlarged shape (Figures 1A,B). The mass in the upper pole of the right kidney had heterogeneous signal and unclear boundary, with scattered lacunae inside it (Figure 1C). The heterogeneous enhancement was delayed after enhancement, and the perirenal fascia was thickened.