Bilateral Asynchronous Renal Cell Carcinoma with Metastatic Involvement of the Tongue

Figure 4

The tumour comprises polygonal cells with clear cytoplasm arranged as alveoli, separated by thin fibrous septa, around a richly vascular stroma. The presence of a “ring” of neoplastic clear cells (arrow)within a dilated capillary indicates intravascular invasion. Haematoxylin and eosin, original magnification ×100.