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Similar Outcome for Robotic vs. Non-Robotic Surgery for Prostate Cancer

July 27, 2016 By Lancet

The first randomized controlled trial to directly compare robotic surgery with open surgery for patients with localized prostate cancer finds that robotic and open surgery achieve similar results in terms of key quality of life indicators at 3 months.

The study, published in The Lancet, is the first stage of a 2-year trial and reports quality of life outcomes such as urinary and sexual function. Longer-term follow-up is now needed to fully assess the outcomes of both techniques, including on cancer survival.

Since the use of robot-assisted laparoscopic prostatectomy (RALP) was first reported in 2000, there has been rapid adoption of robotic surgery for men with prostate cancer. The most common treatment for localized disease is surgery to remove the prostate gland, and some men experience urinary and erectile problems following surgery. For most men, the operation will get rid of the cancer cells, but for around one in three men, cancer cells may return some time after the operation.

In the USA, 80-85 percent of prostatectomies are done robotically, and although the proportion is lower in the UK and Europe, it is increasing. Robotic surgery is more expensive than open surgery (the initial cost of the robot is approximately £1.5 million) and to date, there have been no randomized controlled trials comparing robotic with open surgery.

“Surgery has long been the dominant approach for the treatment of localized prostate cancer, with many clinicians now recommending the robotic method to patients,” said lead author Professor Robert ‘Frank’ Gardiner, University of Queensland Centre for Clinical Research, Brisbane, Australia. “Many clinicians claim the benefits of robotic technology lead to improved quality of life and oncological outcomes. Our randomized trial…found no statistical difference in quality of life outcomes between the two groups at 12 weeks’ follow-up. Patients are now being followed-up for a total of 2 years in order to fully assess the longer-term outcomes, including on cancer survival.”

RALP uses a high magnification (x10) 3-D camera that allows the surgeon to see inside the patient’s abdomen through a keyhole incision. The camera is attached to one of four arms on the robot—the other three hold other surgical instruments needed during the operation. The surgeon is in the operating room but is away from the patient and controls the robotic arms to perform the operation. Robot-assisted surgery is most commonly used for prostatectomies, but is increasingly being used in gynecology, cardiothoracic, head and neck, and general surgery, as well as other operations in urology.

308 men with prostate cancer were included in the study, and were randomly assigned to either receive robot-assisted surgery (157) or open surgery (radical retropubic prostatectomy) (151) and who were followed up for 12 weeks after the operation. All the operations were led by two surgeons at the Royal Brisbane and Women’s Hospital

The primary outcomes included urinary and sexual function at 12 weeks and there was no difference in between the two groups. There were also no differences in the number of post-operative complications. Patients who underwent open surgery spent a longer amount of time in hospital after surgery but on average, both groups spent the same number of days away from work.

Patients who underwent open surgery lost on average three times more blood (although no transfusions were needed during the operations because blood was recycled back into the patients during the open operations). In the immediate aftermath of the surgery, patients who underwent robotic surgery experienced less pain doing day to day activities (at 1 week), and reported better overall physical quality of life (at 6 weeks). Although over time, the differences levelled out and became non-significant at 12 weeks.

The authors note that urinary and sexual function can continue to improve for up to 3 years after surgery, so differences in outcomes between these two groups might become apparent later on. The study is the first stage of a two-year trial.

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