Vimentin 3, the New Hope, Differentiating RCC versus Oncocytoma

Figure 6

Collision tumor, with two different tumor subtypes. Top row: papillary RCC; bottom row: preliminary diagnosis, oncocytoma. H&E staining and immunohistological staining for AMACR and CD117, Vimentin FL, and Vim3 were performed. Questionable was the second tumor type unexpectedly found in the tissue sample. Immune fluorescence staining for Vimentin FL positive (V9) was positive and the immune fluorescence for Vim3 was negative in the papillary RCC component, indicating the malignant tumor subtype, whereas the second one is an oncocytoma (Vim3 positive).