Fig. 5
From: Primary squamous cell carcinoma of the kidney: a case report and review of the literature
a Haematoxylin and eosin (H&E) photomicrograph showing dysplastic squamous mucosa (star) with islands of squamous cell carcinoma within the stroma (long thin arrows). b P63 immunohistochemical stain is positive in dysplastic squamous mucosa (star) and in the invasive tumour (long thin arrows). c CK5/6 immunohistochemical stain is positive in dysplastic mucosa (star) and in the invasive carcinoma (long thin arrows). d S100P immunohistochemical stain is positive in free-lying urothelial cells (long thin arrows) but is negative in dysplastic mucosa (star) and in the invasive tumour. e GATA-3 immunohistochemical stain is positive in lymphocytes in the stroma (long thin arrows) but is negative in dysplastic mucosa (star) and in the invasive carcinoma (original magnification × 200)