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Renal tumor with inferior vena cava (IVC) tumor thrombus still remains one of the most medical challenges in urological oncology. Despite numerous researches reporting the surgical experiences and survivals of this kind of patients, there is still lacking a standard recommended therapy right now. We reported a case of metastatic renal cell carcinoma with Mayo III IVC tumor thrombus who underwent robotic-assisted complete removal of the intracaval thrombus and radical left nephrectomy followed by renal arterial chemoembolization and pazopanib administration. It provides a new scheme and mode of diagnosis and treatment for this kind of patients. The patient was a 50-year-old man with left low-back pain for 20 days diagnosed with left renal tumor and Mayo III IVC tumor thrombus at the earliest. Initially, the patient underwent the renal arterial chemoembolization and targeted treatment to inhibit tumor's progression. After a two-year therapy period, the size of renal mass and lung nodules decreased than before, as well as the IVC tumor thrombus dropped to level II. Considering the efficacy of previous treatments, we performed robot-assisted IVC thrombectomy and radical left nephrectomy for this patient. The post-operative pathological examination confirmed the diagnosis of tumor thrombus as renal clear cell carcinoma. The patients recovered well after surgery and was followed-up for 36 months during the whole treatment course. This case with metastatic renal cell carcinoma (mRCC) and Mayo III IVC tumor thrombus received the interventional therapy, molecular targeted therapy and robot-assisted surgery successively, and acquired satisfying outcome. Patients with mRCC always suffer shorter overall survivals and aggressive progression compared with those localized tumors, therefore it is essential to formulate rational comprehensive treatment and carry out in time following-up.

Comprehensive managements of metastatic renal tumor with Mayo III inferior vena cava tumor thrombus: a case report