Arteriography: (a) before embolization of the main and branch of the right renal artery; (b) After embolization of the main and branch of the right renal artery. Intraoperative landscape: (c) intraoperative mass and severe adhesion of inferior vena cava (arrow indicates inferior vena cava). Gross specimen: (d) complete tumor capsule can be seen by naked eye; (e) the inside of the tumor is gray yellow, gray red, soft, partially translucent, and the kidney is severely squeezed to the side. HE staining: (f) tumor cells were distributed in glandular or solid form, with eosinophilic cytoplasm, oval or polygonal karyotype, fine chromatin, low ISUP grading, and unclear nucleoli (×400). Immunohistochemistry: (g) positive expression of SDHB antibody in the remaining renal tubules (×200); (h) absence of SDHB expression in tumor cells (×200).