PMC8555675_01
Cystoscopy showing a large papillary mass in the fossa navicularis.
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fig1
Upon advancement of the cystoscope, we fund a large papillary mass measuring 5 mm x  6 mm within the fossa navicularis (Figure 1).
Biopsy with hematoxylin and eosin stain showing high-grade noninvasive urothelial carcinoma.
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fig2
After the procedure, the biopsied tissue was sent for analysis, and histopathological examination showed the tumor as noninvasive high-grade papillary urothelial carcinoma (Figure 2).