case_images: PMC2905915_01
case_images: Axial CT scan of the pelvis after IV contrast: oval shape well-defined homogenous small mass at the bladder neck which shows intense enhancement after contrast.
case_images: AU2010-912125.001.jpg
case_images: PMC2905915_01_AU2010-912125.001.jpg
case_images: fig1
case_images: There was no associated lymphadenopathy or invasion to the surrounding pelvic structures (Figure 1). 
case_images: The tumor cells show the characteristic zellballen cells, with abundant eosinophilic cytoplasm and an ill-defined wall separated by fibrovascular stroma. Mitotic figures are not observed. Hematoxylin-Eosin Stain (X400).
case_images: AU2010-912125.002.jpg
case_images: PMC2905915_01_AU2010-912125.002.jpg
case_images: fig2
case_images: The cytoplasm was eosinophilic with indistinct borders (Figure 2).
case_images: Immunostaining for chromogranin A showed strong and diffuse positivity in the tumor cell cytoplasm (X400).
case_images: AU2010-912125.003.jpg
case_images: PMC2905915_01_AU2010-912125.003.jpg
case_images: fig3
case_images: Immunostains were positive for chromogranin A, neurone-specific enolase, S-100 protein and sinaptophysin, while immunostains for epithelial differentiation (using antikeratin monoclonal antibody) were negative (Figure 3).