The immunohistochemical (IHC) profile showed positivity for cytokeratin (CK) and carcinoembryonic antigen (CEA), with negativity for markers typically associated with RCC (e.g., PAX8, CD10) and urothelial carcinoma (e.g., GATA3, uroplakin). This evidence concerns the gene CEACAM5 and urothelial carcinoma.