PMC10258733_01
Primary renal cell carcinoma of type II papillary carcinoma (A) (HE, x200); Bladder tissue showing hyperplastic urothelium at the upper right corner and tumor tissue within the lamina propria at the left lower corner (white arrow) with similar intravascular tumor tissue (black arrows) (B) (HE, x200); Higher power of tissue within vascular lumina in the lamina propria of the urinary bladder (C) (HE, x400); Positive PAX-8 immunostaining within tumor tissue (D) (IHC, Anti-PAX-8 Ab, x200).
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The pathology reported metastatic papillary RCC with PAX-8 positive but GATA-3 negative on immunostaining (Figure 1).
A computed tomography (CT) of the pelvis revealed the residual bladder mass.
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Chest and pelvis CT revealed the residual bladder mass as well as multiple, large metastases to the lungs.
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