PMC7466669_01
Results of MSCT, macro and microscopy. (A) MSCT of the abdominal cavity with contrast. Neoplasm in the middle and lower segments' projection of the right kidney, in size of 147 x 190 x 188 mm, which unevenly accumulated a contrast agent (from 35 units N. to 50-90 units N.). No signs of invasion of the vascular pedicle were noted. (B) Back table examination. Right kidney with a tumor measuring 300 x 253 x 150 mm (4308 g). (C) In the section, the right kidney is completely replaced by yellow-brown tumor masses. (D) Hematoxylin and eosin (H&E)-stained slide. The tumor is represented by interwoven bundles of stretched cells with enlarged hyperchromic nuclei, foci of necrosis and hemorrhages. Mitoses are also observed (original magnification x100). (E) Immunohistochemical reaction with antibodies to SMA (original magnification x200). (F) Immunohistochemical reaction with antibodies to desmin (original magnification x200).
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F1
Multi-slice spiral computed tomography showed that right kidney was displaced upward, rotated anteriorly because of spherical soft tissue mass in the middle and lower segments of the kidney with a size 206 x 186 x 188 mm and clear contours in the structure of which arterial vessels were determined (Figure 1A). The resected tumor had a size of 300 x 253 x 150 mm and 4 kg of weight (Figure 1B). Incision shows that the right kidney was completely replaced by tumor mass (Figure 1C). High mitotic activity (17 mitoses per 10 fields with magnification x400) and foci of necrosis were observed (Figure 1D). The immunohistochemistry showed positive reaction for smooth muscle actin (Figure 1E) and desmin (Figure 1F) and negative reaction for CD99, CD43, CD117, S-100, MCK/PCK, and DOG-1.