Robotic Partial Nephrectomy with En Bloc Removal of a Renal Vein Thrombus for Multiple cT3a Renal Cell Carcinoma Lesions.

Partial nephrectomy (PN) may be recommended for selected patients with advanced-stage (>cT2) renal cell carcinoma (RCC) with the aim of avoiding dialysis and chronic kidney disease-related comorbidities. The spread of robotic surgery has led to expansion of PN indications to more challenging scenarios and even frontier surgeries, including advanced-stage RCC. Here we describe the management of a patient with a solitary kidney diagnosed with multiple cT3a (renal vein thrombus) RCC who was treated using a conservative robotic approach. The most crucial surgical considerations for this procedure were: (1) tailored planning of the surgical approach using three-dimensional reconstruction software; (2) accurate boundary delineation for the tumors and thrombus; (3) avoiding unnecessary warm ischemia time; (4) performing an anatomical excision to follow eventual tumor bulging; and (5) en bloc removal of the main lesion and its thrombus. No perioperative complications were recorded. Histopathology revealed clear cell RCC for all four lesions with nucleolar grade 3 and negative surgical margins. At 12-mo follow-up the patient was disease-free. When performed by an experienced surgeon, PN plus venous thrombus excision for imperative cases with cT3 RCC may represent a valid treatment option with valuable oncological and functional outcomes. Patient summary: We describe the case of patient who had a single kidney with multiple kidney tumors and tumor extension into a blood vessel. The patient was treated with robot-assisted removal of the tumors, sparing as much kidney tissue as possible. This technique was found to be safe and effective, with no complications and good intermediate-term results.