case_images: PMC11097658_01
case_images: (A) Macroscopic appearance of the renal adenoma in the right kidney. The cross-section shows a large beige multilobulated mass occupying one of the renal poles. (B) Microphotography of renal adenoma. Tumor tissue grows in a diffuse confluent tubular pattern with the presence of eosinophilic intraluminal proteinaceous material H&E stain 200x. (C) Magnification of B, scattered tumor-associated lymphocytic infiltration H&E stain 400x. (D) Intraluminal PAS-positive material PAS stain 400x. (E) Tubular tumor tissue, the majority of the neoplastic cells have moderate to strong cytoplasmic immunoreactivity for vimentin immunohistochemistry staining 400x. (F) Strong to moderate immunoreactivity for Pax-8 staining shows the interface between normal renal tissue and neoplasia. Pax-8 immunohistochemistry staining 40x.
case_images: fvets-11-1393039-g001.jpg
case_images: PMC11097658_01_fvets-11-1393039-g001.jpg
case_images: fig1
case_images: The mass extended from the medulla to the cortex, protruding above the renal surface (Figure 1). Microscopically (Figure 1), the neoplasm was well-demarcated, densely cellular, and non-encapsulated with expansile growth. Epithelial cells forming the tubules and acinar structures had a positive cytoplasmic labeling for vimentin and a positive nuclear labeling for Pax-8 immunomarkers (Figure 1).