case_images: PMC5586721_01
case_images: Abdominal CT scan identified a 9.0 x 12.0 cm clear-margined and internally heterogeneous solid tumor (arrow) located at the right renal lower polar.
case_images: mpp-0022-0200-g01.jpg
case_images: PMC5586721_01_mpp-0022-0200-g01.jpg
case_images: F1
case_images: The right renal upper polar was compressed with concurrent cortical atrophy and hydronephrosis, the right renal vein was compressed and displaced, and the adrenal glands exhibited a normal size and shape (fig. 1).
case_images: Histology (a) and CD99 (MIC) immunohistochemistry (b) of the renal PNET (400x).
case_images: mpp-0022-0200-g02.jpg
case_images: PMC5586721_01_mpp-0022-0200-g02.jpg
case_images: F2
case_images: Tumor cells were clustered into the loose rose-ring-like architecture (fig. 2a). Immunohistochemistry of paraffin sections revealed CD99 (+) (fig. 2b), vimentin (+), CgA (-), Sy (+), and EMA (-), confirming the diagnosis of renal PNET.