Gastric Cancer Surgery: What's the Difference Between Laparoscopic and Robotic Surgery? (2026 Update)

Robotic surgery is a type of laparoscopic surgery—the way incisions are made is the same, but the key difference is that instruments are moved via the surgeon's console joysticks rather than by hand. For gastric cancer, robotic surgery is not always essential; the choice depends on the cancer stage and tumor location.

Key Summary

• Robotic surgery is a form of laparoscopic surgery in which the instruments are moved not by the surgeon's hands directly but via joysticks at a console. All movements are still controlled by the surgeon.
• In laparoscopic surgery, a few 0.5–1.2cm incisions are made in the abdomen, and a camera and long instruments are inserted to remove tissue while viewing a monitor; a large portion of gastric cancer surgeries are performed this way.
• The technical differences with robotic surgery are that the instrument tips can bend at wider angles than a human wrist, hand tremor is automatically filtered out, and the view is three-dimensional.
• Robotic surgery is not always necessary for gastric cancer; laparoscopic surgery is often sufficient, and the robotic approach is chosen when particularly precise maneuvering is required.
• Korea's 5-year relative survival rate for gastric cancer is 78.6% (National Cancer Registration Statistics 2019–2023, Central Cancer Registry, National Cancer Center Korea). This is a nationwide figure, not the outcome of any specific surgical method.

What Are the Technical Differences Between Laparoscopic and Robotic Surgery?

• The two methods are the same up through the step of making the incisions. In laparoscopic surgery, the surgeon holds and moves long instruments directly by hand, while in robotic surgery, the console's joysticks move the instruments.
• Robotic instrument tips bend at wider angles than a human wrist, hand tremor is automatically filtered, and the screen shows a 3D image. These differences matter more in narrow, deep spaces.
• Gastric cancer surgery involves subtotal or total gastrectomy along with extensive removal of surrounding lymph nodes. Whether done laparoscopically or robotically, this results in less pain and smaller scars than open surgery, allowing for faster recovery.

Which Method Is More Commonly Used for Gastric Cancer?

• There are three surgical approaches for gastric cancer: open, laparoscopic, and robotic. Both laparoscopic and robotic approaches tend to involve less pain and smaller scars, leading to faster recovery. However, not every patient needs robotic surgery.
• Robotic surgery is described as the method chosen when precise maneuvering is required, for example when working in narrow spaces close to nerves. For a large share of stomach and colon surgeries, laparoscopic surgery is reported to be sufficient.
• Robotic surgery is common in thyroid cancer and prostate cancer, and among colorectal cancers, it is known to offer significant advantages for rectal cancer located deep in the pelvis. Which approach is appropriate is determined by the tumor's location and stage.

In What Order Is the Surgical Method Decided?

• Step 1: Gastroscopy and biopsy confirm the histologic type and differentiation.
• Step 2: Abdominal and chest CT scans assess the extent of invasion into the stomach wall, lymph node metastasis, and spread to other organs. For early gastric cancer, endoscopic ultrasound is added.
• Step 3: The stage (TNM) is determined. Early gastric cancer confined to the mucosa can often be treated with endoscopic resection (ESD) alone, while for stages requiring surgery, the appropriate method—open, laparoscopic, or robotic—is chosen based on tumor location and other conditions.
• Step 4: After surgery, whether adjuvant chemotherapy is needed is decided based on the pathology results, and for stage 2–3 disease, chemotherapy may be added before and/or after surgery.

FAQ — Does Robotic Surgery Give Better Results Than Laparoscopic Surgery?

It depends on the organ and stage. In narrow spaces close to nerves, such as deep within the pelvis or the thyroid area, robotic surgery offers clear advantages, while for a large share of stomach and colon surgeries, laparoscopic surgery is reported to be sufficient. There are also cost differences, so it is worth comparing both approaches together.

FAQ — How Much Do Scarring and Hospital Stay Differ?

Endoscopic resection leaves no surgical scars on the body, while laparoscopic and robotic surgery leave a few small puncture marks of about 1cm plus a small incision for removing tissue—still smaller than scars from open surgery. Hospital stays are reported as roughly 2–4 days for endoscopic resection and 5–10 days for laparoscopic or robotic resection, with a total stay of 2–3 weeks generally being the target for laparoscopic or robotic cases.

Sources and Notes

• This article was written based on notes on robotic surgery and gastric cancer (National Cancer Information Center, NCCN Guidelines for Patients, National Cancer Registration Statistics 2019–2023, Central Cancer Registry, National Cancer Center Korea).
• This content is intended to provide general medical information, and actual diagnosis, treatment methods, and outcomes may vary depending on individual circumstances. Please consult with your medical team to determine an accurate diagnosis and appropriate treatment.