Fig. 2

A 38-year-old man with a round, well-circumscribed and predominantly solid mass of approximately 4 cm in diameter in the lower pole of the right kidney. On unenhanced CT the tumour exhibited a slightly high density (A). In the corticomedullary phase, the solid portion of the tumour demonstrated less intense enhancement compared to the renal cortex (B, 0 points). In the nephrographic phase, the enhancement persisted but remained lower than the renal cortex (C). The tumour was homogeneous in density, with no necrotic components observed (0 points), and displayed a persistent enhancement pattern without a surrounding pseudocapsule (0 points). The total score of 0 points strongly indicated eosinophilic solid and cystic renal cell carcinoma, which was confirmed by the final pathological findings.