Fig. 2
From: Metanephric stromal tumor in an adult with PDGFRA mutation: a case report
Pathological features of metanephric stromal tumor (MST). A: The MST was located in the medulla, with subtle infiltration into the adjacent renal parenchyma (Hematoxylin and eosin stain (HE), 4×). B: The MST shows a nodular appearance and interstitial myxoid degeneration (HE, 10×). C: The tumor cells form a slight “onion-skin” appearance surrounding entrapped renal tubules (black arrow) (HE, 20×). C–D: Dysplastic small vessels were observed (green arrow) (HE, 20×)