Fig. 2From: Conservative management of primary malignant melanoma of the bladder: a case reporta Hematoxylin/eosin staining (50× magnification) showing a proliferation composed of a mixture of spindle and epithelioid cells with abundant cytoplasm, irregular nuclei, prominent eosinophilic nucleoli and severe pleomorphism; b Immunohistochemical staining (50× magnification) revealing positivity for S100Back to article page