An Intratumoral Aneurysm and an Extrarenal Synchronous Cystic Tumour in a Case of a Renal Cell Carcinoma

Figure 3

Microscopic appearance of the tumour. (a) Closely packed nests comprising a dual population of cells—H&E 40x. (b) High-power view showing nests of large polygonal cells with clear cytoplasm, surrounded by a thin capillary network. The admixed second population of small cells are forming rosettes around deeply eosinophilic basement membrane like material—H&E 400x. (c) Positive immune-staining for Melan-A. (d) Negative staining for Vimentin.

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