Primary parenchymal squamous cell carcinoma of the kidney: A case report

Figure 1 Medical image. A: Ultrasound examination showing a mass in the right kidney with hypoechoic areas and echogenic stones within, accompanied by posterior acoustic shadowing. Color doppler flow imaging shows blood flow signals within the mass; B: Computed tomography urography views show the mass and internal stones Coronal; C: Sagittal; D: The tumor shows slightly low signal intensity on T1 weight ed imaging; E: Magnetic resonance T2-weighted imaging shows a clearly defined right renal tumor with a low signal pseudocapsule (arrow). The internal signal is heterogeneous, with nodular short T2 signal stones and long T2 cystic necrosis. The solid tumor tissue shows isointense T2 signal; F: Diffusion-weighted imaging shows high signal intensity in the solid tumor tissue and low signal intensity in the cystic necrotic areas. Enlarged lymph nodes are visible in the retroperitoneum (arrow); G: Apparent diffusion coefficient map shows low signal intensity in the solid tumor components; H: Contrast-enhanced scan shows heterogeneous mild enhancement of the solid tumor components.

Figure 2 High-grade squamous cell carcinoma tissue within the renal parenchyma, with a significant inflammatory cell response in the stroma (Hematoxylin-eosin stains × 10).

Figure 3 Enhanced computed tomography scan four months post-surgery. A: The original surgical area shows a mass; B: The tumor invaded the psoas major muscle (arrow) and the right abdominal wall; C: The mass also invades the VI segment of the liver (asterisk) and the inferior vena cava (arrow).