case_images: PMC8555675_01
case_images: Cystoscopy showing a large papillary mass in the fossa navicularis.
case_images: qmj-2021-060-g001.jpg
case_images: PMC8555675_01_qmj-2021-060-g001.jpg
case_images: fig1
case_images: Upon advancement of the cystoscope, we fund a large papillary mass measuring 5 mm x  6 mm within the fossa navicularis (Figure 1).
case_images: Biopsy with hematoxylin and eosin stain showing high-grade noninvasive urothelial carcinoma.
case_images: qmj-2021-060-g002.jpg
case_images: PMC8555675_01_qmj-2021-060-g002.jpg
case_images: fig2
case_images: 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).