PMC9719804_01
Cross-sectional imaging of the patient (
arrow
: right renal mass;
broken arrow
: left renal mass). (
A
) Out-of-phase T1 magnetic resonance sequence shows absence of fat. (
B
) Diffusion-weighted T2 magnetic resonance sequence shows restricted diffusion. (
C, D
) Contrast enhanced axial and coronal computerized tomography images show contrast uptake by both lesions.
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PMC9719804_01_10-1055-s-0042-1759546-i2022050659-1.jpg
FI2022050659-1
T2 images ( Fig. 1 ). There was a left lower lobe heterogeneous mass which was iso-intense on T1 and iso-/hyper-intense on T2 images. The parenchymas of both native kidneys were thin and atrophic in accordance with a renal disorder.
(
A
) The excised right-sided tumor with prominent pseudocapsule which is friable and necrotic with areas of hemorrhage. (
B
) Sectioning of the atrophic left kidney revealed the mass in renal parenchyma detected in horizontal serial sections
(inset)
. (
C
) Microscopic examination revealed papillae or tubulopapillary architecture with fibrovascular cores. Papillae were lined by a single layer of cells with scant amount of pale cytoplasm and low nuclear grade (H&Ex200). (
D
) The papillae contained numerous foamy macrophages (H&Ex200).
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FI2022050659-2
The histopathological examination revealed a right-sided 70 x 60 x 50-mm and a left-sided 6 x 6 x 5-mm papillary RCCs both with CK7, AMACR, CD10, and vimentin expression ( Figs. 2 and 3 ).
(
A-D
) Tumoral cells expressed CK7 (x200), AMACR (x200), CD10 (x400), and vimentin (x200).
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FI2022050659-3
The histopathological examination revealed a right-sided 70 x 60 x 50-mm and a left-sided 6 x 6 x 5-mm papillary RCCs both with CK7, AMACR, CD10, and vimentin expression ( Figs. 2 and 3 ).