Fig. 4. Histopathological examination of the disseminated nodules. (A) Hematoxylin and eosin staining shows tumor cells resembling plasma cells with eccentric nuclei and clear cytoplasm (×250); Immunohistochemistry was positive for CK AE1/3 (B), CK7 and CD138 (C), and negative for E-cadherin (D) compatible with plasmacytoid subtype of urothelial carcinoma (×100).
