Robotic Cancer Surgery: Where Precision Meets Innovation — Dr. Vishnu Agarwal, Jaslok Hospital

Cancer surgery has transformed dramatically over the past two decades — from large open incisions to minimally invasive, robot-assisted precision. In this episode of Just Health for the People, a public health awareness initiative by Jaslok Hospital, host Jitendra Hariyan speaks with Dr. Vishnu Agarwal, a distinguished oncosurgeon specializing in laparoscopic and robotic surgery, about how technology is redefining cancer care.

Dr. Agarwal trained at Mumbai University and Tata Memorial Hospital, with further international training in South Korea and France. With over 19 years of experience and more than 7,000 surgeries performed, he specializes in gynecological, breast, and colorectal cancers — including performing India's first robotic breast tumor surgery. He is also actively involved in training fellow surgeons in these advanced techniques.

What Is Cancer? Clearing Up a Common Myth

Dr. Agarwal addresses a widespread misconception right away: cancer is not a contagious disease that spreads from person to person. Rather, cancer occurs when a person's own cells become abnormal. While normal cells grow, die, and are naturally replaced, cancer cells grow rapidly and uncontrollably, eventually forming a lump or tumor. The key distinguishing feature of cancer is that this lump doesn't stay confined to one location — it can spread to other parts of the body, a process known as metastasis. If treated at an early stage, however, cancer is highly curable.

How Do Doctors Decide Between Chemotherapy, Radiation, and Surgery?

Not every cancer patient requires all three treatment modalities. For example:

• Blood cancers are primarily treated with chemotherapy, with limited role for surgery or radiation
• Breast cancer often requires a combination of all three — chemotherapy, surgery, and radiation

The specific treatment plan depends heavily on the stage and biology of the cancer at presentation. For instance, an early-stage breast cancer with favorable biology may be treated with surgery alone, while a more advanced stage may require chemotherapy first to shrink the tumor before surgery and radiation follow. Because every case is different, Dr. Agarwal's team reviews cases collectively in tumor boards to determine the optimal treatment path for each patient.

How Cancer Surgery Has Evolved Over Time

Twenty years ago, cancer surgery was predominantly open surgery — requiring a full incision to access and remove tumors, such as cutting open the abdomen to remove a section of colon. After training internationally in South Korea and France, Dr. Agarwal adopted minimally invasive surgery, where small holes are made in the abdomen for instruments to perform dissection, followed by a small incision to remove the tumor.

Both laparoscopic and robotic surgery fall under this minimally invasive category, but robotic surgery offers distinct advantages over laparoscopic techniques.

Debunking the Robotic Surgery Myth

One of the most common misconceptions patients have is imagining that robotic surgery means the robot operates autonomously, with the surgeon simply sitting back and watching. Dr. Agarwal is clear: this is completely false. Robotic surgery is entirely under the surgeon's control at all times.

How Robotic Surgery Actually Works

• The patient lies on the operating table, with robotic instruments positioned at the surgical site
• The surgeon sits at a console in the same operating room (not physically at the patient's side)
• A camera provides a magnified view inside the abdominal cavity, displayed to the surgeon through the console
• The surgeon's hand movements are translated in real-time to the robotic instruments
• The surgeon decides every action — when to start, stop, and how to proceed; nothing happens automatically

Advantages of Robotic Surgery

Superior Precision and Dexterity

Robotic instruments offer seven degrees of freedom of movement — exceeding even the natural range of motion of the human hand. This makes deep pelvic surgeries (such as prostate, rectal, or uterine procedures) significantly easier to access and perform with precision.
 

Enhanced Magnification

Robotic surgery offers magnification roughly 15 times greater than open surgery and notably higher than laparoscopic surgery — allowing surgeons to clearly see even small blood vessels, reducing the risk of accidental damage and minimizing blood loss.
 

Reduced Complications and Blood Loss

Because incisions are limited to small ports rather than large cuts, complication rates and blood loss are significantly reduced.
 

Faster Recovery and Shorter Hospital Stay

The difference in hospital stay length is substantial:

• Open surgery (e.g., hysterectomy, gynecological or colorectal cancers): typically 7 days minimum stay
• Robotic surgery: patients often go home by the second or third day, without requiring ICU admission, since there's minimal incision-related stress and antibiotic use is significantly reduced
   

Is Robotic Surgery Suitable for All Cancer Types?

Not all cancer surgeries benefit equally from robotic assistance. Robotic surgery shows clear advantages particularly in:

• Abdominal surgeries (including liver and pancreatic surgeries)
• Thoracic and esophageal surgeries
• Rectal surgeries
• Uterine cancers
• Prostate cancer — now considered the gold standard treatment approach, given the technique's ability to dramatically reduce blood loss (from 2–3 liters in open surgery to minimal blood loss) and reduce surgical time (from around 8 hours to as little as 2 hours in expert hands)
   

Overcoming Patient Hesitation and Cost Concerns

Beyond the misconception about robot autonomy, cost is another common concern patients raise. However, Dr. Agarwal notes that when factoring in the significantly reduced hospital stay, ICU costs, and antibiotic use associated with open surgery, the overall cost difference is largely offset. One remaining challenge: insurance companies don't yet fully approve robotic surgery coverage in all cases, which can be an additional consideration for patients.
 

Benefits for Surgeons, Too

Robotic surgery isn't just advantageous for patients — Dr. Agarwal notes it significantly benefits surgeons as well:

• Time efficiency: With experience (having performed nearly 100 robotic surgeries), procedures often take less time than open surgery, since there's no lengthy opening and closing of the abdomen
• Full control: Unlike laparoscopic surgery, where a surgeon depends on an assistant to hold the camera and instruments correctly, robotic surgery puts everything directly under the surgeon's own control — comparable to driving a car rather than depending on someone else
• Reduced physical strain: Sitting at a console while operating allows surgeons to remain more relaxed, even during multiple procedures in a single day
   

Robotic Surgery in Gynecological Cancers

Gynecological cancers fall into three main categories: uterine (endometrial) cancer, cervical cancer, and ovarian cancer. Robotic surgery currently plays its most established role in endometrial and uterine cancers, where minimally invasive surgery is now the standard of care, offering the same oncological safety (lymph node yield, etc.) as open surgery, but with less blood loss, fewer complications, and lower conversion rates to open surgery.

For ovarian cancer, robotic surgery can be used in very early-stage disease or when a tumor has responded completely to chemotherapy. For cervical cancer, robotic surgery is suitable for early lesions, though not for more advanced cases.

Dr. Agarwal notes that he commonly performs endometrial cancer surgeries robotically, with procedures typically completed in about 1.5 hours, and patients discharged comfortably by the second day.
 

Robotic Surgery in Colorectal Cancer

Colorectal cancer treatment differs based on location:

• Colon cancer: Both laparoscopic and robotic approaches are viable
• Rectal cancer: Given its deep location within the pelvis, robotic surgery plays a particularly important role. The long reach and seven-degree range of motion allow surgeons to navigate deep pelvic structures with precision — critically, this often allows surgeons to preserve normal bowel function and avoid a permanent stoma, even in very low rectal cancers that previously would have required one.
   

Real Patient Cases: The Impact of Robotic Surgery

Dr. Agarwal shares two particularly meaningful cases:

A 30-year-old newly married software engineer was diagnosed with low rectal cancer located just 4 cm from the anal verge. Using robotic surgery, Dr. Agarwal was able to perform deep pelvic dissection and colonic anastomosis, successfully preserving her from a permanent stoma. She has since returned to a completely normal life, working and living without complication.

An 85-year-old woman diagnosed with uterine cancer had a worried family uncertain whether she could safely undergo surgery at all. Following robotic surgery, she recovered remarkably quickly and was discharged within five days — reassuring a family who had feared she might not survive the procedure.
 

The Future of Robotic Surgery in Cancer Care

Dr. Agarwal believes robotic surgery — already well-established today — will increasingly become the norm in cancer treatment. As patient expectations shift toward minimal scarring, shorter hospital stays, and faster returns to normal life, robotic surgery is well-positioned to meet these evolving demands.
 

Key Message for Patients

Dr. Agarwal's core message: a cancer diagnosis is not something to fear, since cancer is highly curable — especially when treated early rather than neglected. Similarly, the prospect of cancer surgery itself shouldn't be a source of dread. With robotic-assisted techniques, patients can often go home within 2–3 days with significantly reduced pain and minimal scarring, rather than the extended hospital and ICU stays historically associated with cancer surgery. Patients are encouraged to discuss robotic surgery options with their doctor, with laparoscopic surgery remaining a solid alternative where robotic surgery isn't available or appropriate.

This article is based on an episode of Just Health for the People, a public health awareness initiative by Jaslok Hospital, featuring Dr. Vishnu Agarwal, oncosurgeon specializing in robotic and laparoscopic cancer surgery. Watch the full video here: Robotic Cancer Surgery Explained by Dr. Vishnu Agarwal

For consultation regarding cancer diagnosis, robotic surgery options, or gynecological and colorectal cancer treatment, please reach out to Jaslok Hospital's Department of Surgical Oncology.