Primary Small Cell Carcinoma in Urinary Bladder: A Rare Case

Figure 2

(a) Surface infiltrating urothelial lining laminated propria below shows the small round malignant tumor infiltration (Hematoxylin Eosin stain, ×100). (b) Multiple small round necrotic areas were seen in the malignant tumors (Hematoxylin Eosin stain, ×100). (c) The synaptophisin positivity in neoplastic cells (immunohistochemical stain, ×200). (d) Neoplastic cells in diffuse moderate expression of CD56 membranous (immunohistochemical stain, ×200). (e) This p53 weak expression in basal area is considered negative staining. (immunohistochemical stain, ×200). (f) In general the neoplastic cells negative CK-7 expression (immunohistochemical stain, ×200).

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