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. Author manuscript; available in PMC: 2012 Nov 25.
Published in final edited form as: Hum Pathol. 2012 Mar 9;43(10):1590–1595. doi: 10.1016/j.humpath.2011.11.016

Fig. 1.

Fig. 1

Patterns of EGFR immunoexpression. A, Invasive high-grade papillary urothelial carcinoma with no EGFR expression. B, Invasive high-grade urothelial carcinoma with focal positivity; cases that showed this staining pattern were considered as “EGFR positive, low expression level.” C, High-grade invasive urothelial carcinoma with strong and diffuse EGFR immunoexpression. Cases showing this staining pattern were considered as “EGFR positive, high expression level.” D, A higher magnification is depicted here.