case_images: PMC4537719_01
case_images: Abdominal computed tomography revealed an ill-defined tumor arising from the lower pole of the right kidney.
case_images: CRIPA2015-841237.001.jpg
case_images: PMC4537719_01_CRIPA2015-841237.001.jpg
case_images: fig1
case_images: Upper abdominal computed tomography revealed a horseshoe kidney and a well-defined mass of 4 cm arising from the lower pole of the right kidney (Figure 1).
case_images: Gross photograph of the cut surface of the right kidney showing a heterogeneous tumor mass.
case_images: CRIPA2015-841237.002.jpg
case_images: PMC4537719_01_CRIPA2015-841237.002.jpg
case_images: fig2
case_images: The cut surface of the excised specimen showed a solid, circumscribed, heterogeneous tumor (size 4.3 x 3.5 cm), with solid areas alternating with cystic and hemorrhagic areas with widely clear margins (Figure 2).
case_images: (a) Tumor pseudocapsule composed of fibrous tissue. H&E stain, x50. (b) Papillae covered by large cells with abundant eosinophilic cytoplasm. H&E stain, x100. (c) Pseudostratified high-grade nuclei with prominent nucleoli. H&E stain, x400.
case_images: CRIPA2015-841237.003.jpg
case_images: PMC4537719_01_CRIPA2015-841237.003.jpg
case_images: fig3
case_images: Histopathological examination revealed a tumor surrounded by a pseudocapsule, composed of papillae covered with cells with abundant eosinophilic cytoplasm and high-grade nuclei with prominent nucleoli (Figure 3).
case_images: (a) Reactivity to EMA. Immunohistochemical stain with anti-EMA antibody, x100. (b) Reactivity to Vimentin. Immunohistochemical stain with anti-Vimentin antibody, x100. (c) Reactivity to AMACR. Immunohistochemical stain with anti-AMACR antibody, x100.
case_images: CRIPA2015-841237.004.jpg
case_images: PMC4537719_01_CRIPA2015-841237.004.jpg
case_images: fig4
case_images: EMA, Vimentin, and AMACR were strongly positive (Figure 4).