Robotic Partial Nephrectomy

Who May Benefit

Robotic partial nephrectomy may be appropriate if you:

• Have a small renal mass, typically under 7 cm, confined to the kidney
• Have a tumour in a solitary kidney, or tumours in both kidneys
• Have pre-existing chronic kidney disease, diabetes or hypertension, where preserving nephrons matters especially
• Have a hereditary kidney cancer syndrome with a likelihood of further tumours over time
• Are younger, with a long horizon over which kidney function needs to be protected
• Have been told elsewhere that only complete kidney removal is possible, and want a second opinion on feasibility

When This May Not Be the Right Option

• Large tumours, or centrally located tumours involving the renal hilum, where partial removal cannot achieve safe clearance
• Tumour extending into the renal vein or inferior vena cava
• Multiple prior kidney operations with extensive scarring making dissection unsafe
• A normally functioning opposite kidney combined with a complex tumour, where radical nephrectomy may be the sounder choice

The Procedure and the Alternatives

What the Operation Involves

Performed under general anaesthesia through several small ports. The renal artery is temporarily clamped, the tumour is excised with a margin of normal tissue, and the defect is reconstructed. Blood flow is then restored. Operating time varies with tumour complexity, and most patients stay in hospital for two to three days.

Transperitoneal versus Retroperitoneal Access

Anterior and lateral tumours are usually approached through the abdominal cavity; posterior tumours are often better reached retroperitoneally, which avoids the bowel altogether. Published comparisons show both are safe, with the choice guided by tumour position.

Alternatives

• Radical nephrectomy — removal of the whole kidney; the right choice for large or centrally placed tumours
• Thermal ablation — cryotherapy or radiofrequency for small tumours in patients unfit for surgery
• Active surveillance — for small masses in older patients or those with limited life expectancy
• Open partial nephrectomy — still appropriate in selected complex cases

Investigations Usually Required

• Triphasic contrast CT of the abdomen — the principal planning study; defines arterial anatomy, tumour depth and the relationship to the collecting system
• Nephrometry scoring (RENAL or PADUA) — a standardised measure of tumour complexity that predicts operative difficulty and complication risk
• MRI abdomen — where iodinated contrast is contraindicated, or for characterising cystic lesions
• Serum creatinine and estimated GFR — baseline kidney function
• Split renal function scan — in solitary kidney or bilateral disease, or where function is already impaired
• CT chest — staging
• Pre-anaesthetic workup — blood counts, coagulation profile, ECG and cardiac assessment as indicated

Important Limitations and Risks

• Bleeding is the principal risk, both during surgery and in the weeks afterwards. Delayed bleeding from a pseudoaneurysm occurs uncommonly and may require angioembolisation.
• Urinary leak from the collecting system can occur where the tumour was deep, sometimes requiring a stent or drain.
• Conversion to radical nephrectomy. If bleeding cannot be controlled or the margin is inadequate, removing the whole kidney may become necessary during the operation. This possibility is discussed and consented for beforehand.
• Some loss of kidney function is expected on the operated side, related to how much tissue was removed and how long blood flow was interrupted.
• Positive surgical margin occurs in a small proportion of cases and may prompt closer surveillance or further treatment.
• Local recurrence remains possible, so imaging surveillance continues for years.
• Complexity drives risk. A high nephrometry score means a longer operation and a higher chance of complications — this will be discussed frankly in your case.

What a Consultation Involves

A surgical consultation usually takes 30 to 45 minutes and covers:

• Direct review of your CT scan — looking at the images together to explain where the tumour sits and what makes it straightforward or difficult
• Feasibility assessment — an honest answer on whether the kidney can be preserved, and the likelihood of needing to convert to full removal
• Your kidney function — current status and the expected effect of surgery
• Comparison with alternatives — radical nephrectomy, ablation or surveillance, and why one may suit you better
• Recovery expectations — hospital stay, drains, activity restrictions, and return to work
• Follow-up plan — the imaging schedule after surgery
• Your questions

Please bring imaging on CD rather than reports alone — the actual images are essential to this assessment.