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. 2021 Dec 3;23(1):e13486. doi: 10.1002/acm2.13486

FIGURE 3.

FIGURE 3

A 52‐year‐old woman (case 13). A slightly hyperdense solid mass in the left kidney was found accidentally on the axial unenhanced multidetector computed tomography (MDCT) (a), which shows no enhancement on the corticomedullary phase (b), slight enhancement on the nephrographic phase (c), further enhancement on the excretion phase (d). It was confirmed as mixed epithelial and stromal tumor of the kidney (MESTK) by histopathological staining with the epithelium and stroma (e) and immunohistochemical staining ((f) positive for smooth muscle actin, representing the stromal area; (g) positive for pan‐cytokeratin, representing epithelial areas). The lesion (case 13) was classified into solid type according to the equation