“…This test is suitable to screen for TCC in dogs in the absence of moderate to marked hematuria, pyuria, glucosuria, or proteinuria (Borjesson et al, 1999). However, the specificity of the test declines rapidly if dogs have non-TCC urinary tract disease (Borjesson et al, 1999;Henry et al, 2003). Finally, cyclooxygenase-2 (COX-2), uroplakin III, and cytokeratin 7 show promise as useful immunohistochemical stains to verify tumors of urothelial origin in histology sections if needed (Khan et al, 2000;Knottenbelt et al, 2006;Ramos-Vara et al, 2003).…”