Fig. 4From: Gallbladder metastasis of renal cell carcinoma presenting as a hypervascular polypoid lesion: case report of two cases with immunohistochemical analysisThe tumor was composed of dense proliferation of neoplastic cells having clear cytoplasm in the submucosal layer covered by normal mucosal layer (a H&E × 12.5, b H&E × 200). Immunohistochemical analysis showed positive staining for CA9 in a membranous pattern (c)Back to article page