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Upper GI Cancer · Stomach Cancer Surgery · Pune

Stomach Cancer & Robotic D2 Gastrectomy

D2 Lymphadenectomy · Robotic & Minimally-Invasive · Perioperative Chemotherapy

Curing stomach cancer depends on two things done well: removing the tumour with clear margins, and a thorough D2 lymph node dissection — the global standard. Dr. Vinod T. Gore performs robotic and minimally-invasive gastrectomy with meticulous D2 dissection, combined with modern perioperative chemotherapy.

Robotic D2 Gastrectomy D2 — The Global Standard Perioperative FLOT Chemotherapy FARIS Edinburgh
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Rectal Cancer Surgery - Dr. Vinod T. Gore
D2
The global standard lymph node dissection
37%
Cancer death with D2 vs 48% with D1 (Dutch 15-yr)
50 mo
Median survival with perioperative FLOT chemo
300+
Robotic procedures by Dr. Gore
Understanding Stomach Cancer

What is stomach cancer?

Stomach (gastric) cancer arises from the lining of the stomach, most often as an adenocarcinoma. It can occur anywhere — from the upper stomach near the food pipe to the lower stomach (antrum) near the outlet — and the location influences which operation is needed.

Stomach cancer is often silent early on, with vague indigestion-like symptoms, so many patients are diagnosed late. The good news is that, caught early, it is very treatable — and the cornerstone of cure is a properly performed gastrectomy with a thorough D2 lymph node dissection, usually combined with chemotherapy before and after surgery.

Most cases are linked to Helicobacter pylori infection and to diet, which means a significant proportion of stomach cancer is preventable through treating the infection and improving diet.

Key Facts
D2
Thorough D2 node dissection is the standard for cure
H. pylori
The single biggest risk factor — and treatable
FLOT
Chemotherapy before & after surgery improves survival
Robotic
Helps the delicate D2 dissection around the pancreas
Lap.
Staging laparoscopy detects hidden peritoneal spread
Two Patterns of Disease

Intestinal vs diffuse stomach cancer

Pathologists describe two main patterns (the Lauren classification). They behave differently, which influences the operation and the urgency of clear margins.

Intestinal Type
Gland-forming · often distal
Pattern
Forms recognisable glands; tends to grow as a defined mass
Linked to
H. pylori, diet, atrophic gastritis; more common with age
Behaviour
Often distal; generally a better prognosis stage-for-stage
Diffuse Type
Poorly cohesive · signet-ring cells
Pattern
Scattered, poorly-cohesive cells; can spread within the wall (linitis plastica)
Linked to
Younger patients; sometimes inherited (CDH1 gene)
Behaviour
More aggressive; wider margins and often total gastrectomy needed
Causes & Risk Factors

What causes stomach cancer?

Most stomach cancer develops over years from chronic inflammation of the lining. Many of the drivers are preventable or treatable.

H. pylori infection
The single biggest risk factor — and treatable with antibiotics, which lowers risk.
Salty & preserved foods
Diets high in salt, smoked, pickled or processed foods raise the risk.
Low fruit & vegetables
A diet low in fresh fruit and vegetables increases risk.
Smoking
Smoking is an established cause, especially of upper-stomach cancer.
Family history / CDH1
A family history, or the inherited CDH1 gene (hereditary diffuse gastric cancer), raises risk.
Atrophic gastritis
Long-standing inflammation, pernicious anaemia or intestinal metaplasia of the lining.
Obesity & reflux
Linked particularly to cancers of the upper stomach and junction.
Previous gastric surgery
Prior stomach surgery or certain stomach polyps increase long-term risk.

Prevention: testing for and treating H. pylori, not smoking, and a diet rich in fresh fruit and vegetables all lower the risk. People with a strong family history or known CDH1 mutation should seek genetic counselling.

Warning Signs

Symptoms of stomach cancer

Early stomach cancer often feels like ordinary indigestion, which is why it is missed. Persistent symptoms — especially with weight loss, vomiting or anaemia — need an endoscopy.

Persistent indigestion, heartburn or upper-abdominal discomfort
Feeling full quickly when eating (early satiety) and loss of appetite
Unintentional weight loss
Nausea or vomiting, sometimes after meals
Tiredness and anaemia, or black/tarry stools from slow bleeding
Difficulty swallowing (with upper-stomach or junctional tumours)
New indigestion that persists, or any indigestion with weight loss, difficulty swallowing, vomiting or anaemia — especially over the age of 50 — should prompt an endoscopy rather than long-term antacids alone.
Disease Staging

Stomach cancer stages & outlook

Staging uses endoscopy with biopsy, endoscopic ultrasound (EUS) for depth, CT and PET-CT, and a staging laparoscopy with peritoneal washings — which is important in stomach cancer to detect hidden spread on the peritoneum.

StageClassificationDescription5-yr Survival
Stage I
T1–T2, N0–N1Limited to the inner layers. Very early tumours may be removed endoscopically; others by surgery.70–90%
Stage II
T1–T3, N0–N2Deeper invasion or limited node spread. Perioperative chemotherapy with D2 gastrectomy.45–60%
Stage III
T3–T4, N+Advanced local disease and/or more nodes. Chemotherapy plus D2 gastrectomy.20–40%
Stage IV
Any T, Any N, M1Spread to the peritoneum or distant organs. Systemic therapy; surgery or HIPEC for selected cases.Variable
Treatment Pathway

From diagnosis to recovery

Stomach cancer is treated as a planned sequence — chemotherapy around a properly performed D2 gastrectomy gives the best chance of cure.

01
Step 01
Diagnosis & Staging
Endoscopy with biopsy, EUS, CT and PET-CT, plus a staging laparoscopy with peritoneal washings to detect hidden spread. HER2 and biomarker testing guide drug therapy.
02
Step 02
MDT Planning
The multidisciplinary tumour board agrees a plan based on the location, stage, pattern (intestinal vs diffuse) and biomarkers.
03
Step 03
Perioperative Chemotherapy
For most resectable cancers beyond the earliest stage, chemotherapy is given before and after surgery — the FLOT regimen — which improves cure rates.
04
Step 04
Gastrectomy with D2
Removal of part or all of the stomach with a thorough D2 lymph node dissection — performed robotically or laparoscopically wherever possible.
05
Step 05
Pathology & Adjuvant
Margins, node count and biomarkers are reviewed. Adjuvant chemotherapy completes the perioperative plan; targeted or immunotherapy is added where indicated.
06
Step 06
Recovery & Nutrition
Staged return to eating with dietitian support; vitamin B12 and iron monitoring — lifelong B12 after total gastrectomy.
Surgical Treatment

Gastrectomy — tailored to the tumour

The operation removes the part of the stomach containing the cancer, with a clear margin and a thorough D2 node dissection. How much stomach is removed depends on the tumour’s position and pattern — and wherever possible Dr. Gore performs it robotically.

Preferred Approach · Robotic
Robotic D2 Gastrectomy
Precise D2 Dissection · Less Trauma · Same Cancer Clearance

The hardest, most important part of stomach cancer surgery is the D2 lymph node dissection — clearing nodes that hug the major arteries and the delicate surface of the pancreas. This is exactly where robotic surgery helps: the magnified 3D view, wristed instruments and tremor filtration allow precise, controlled dissection in this difficult area, with studies reporting less blood loss, faster recovery and, in some series, fewer pancreas-related complications — while achieving the same lymph node clearance and oncological outcome as open surgery.

Antrum / Lower-Third Tumours
Distal (Subtotal) Gastrectomy
Removes the lower part of the stomach containing the tumour, with a D2 node dissection, and reconnects the remaining upper stomach to the small bowel. The upper stomach is preserved, which helps with eating afterwards.
  • For lower / distal tumours
  • Upper stomach preserved
  • Roux-en-Y or Billroth reconstruction
  • Robotic or laparoscopic with D2
Proximal, Diffuse or Extensive
Total Gastrectomy
Removes the entire stomach with a D2 dissection, joining the food pipe directly to the small bowel (Roux-en-Y). Needed for upper, diffuse or extensive tumours; patients need lifelong vitamin B12.
  • For proximal / diffuse / large tumours
  • Whole stomach removed with D2
  • Roux-en-Y oesophago-jejunostomy
  • Lifelong vitamin B12 supplementation
Selected Upper-Third Early Tumours
Proximal Gastrectomy
For selected early tumours of the upper stomach, the upper portion is removed while preserving the lower stomach — helping maintain weight and reduce anaemia.
  • For selected early upper tumours
  • Preserves the distal stomach
  • Better weight & haemoglobin maintenance
  • Careful patient selection
Very Early (T1a) Cancers
Endoscopic Resection (EMR / ESD)
The earliest, superficial cancers confined to the lining can be removed through the endoscope — no incisions and the whole stomach preserved — when strict criteria are met.
  • For the earliest mucosal cancers
  • No incisions; organ preserved
  • Endoscopic mucosal / submucosal dissection
  • Close surveillance afterwards
The Heart of the Operation

What is D2 lymphadenectomy?

Stomach cancer spreads first to the lymph nodes around the stomach and along its arteries. How thoroughly these are removed strongly affects the chance of cure — which is why the ‘D-level’ of dissection matters.

D1 Dissection
Perigastric nodes only
Removes
Only the lymph nodes immediately next to the stomach
Used for
Selected very early tumours
Limitation
Higher locoregional recurrence in advanced disease
D2 Dissection — The Standard
Perigastric + arterial nodes
Removes
D1 nodes plus those along the major arteries (left gastric, common hepatic, splenic, coeliac)
Evidence
The Dutch trial showed D2 lowers recurrence and gastric-cancer death — now the global standard
Modern D2
The spleen and pancreas are preserved, making D2 safe in expert hands
Why Robotic for the Stomach

Precision for the D2 dissection

The lymph nodes that must be cleared in stomach cancer sit against the body’s major arteries and the surface of the pancreas — technically the most demanding part of the operation. The control and magnification of robotic surgery are ideally suited to performing this D2 dissection thoroughly and safely.

Magnified 3D vision
A ten-times magnified, true-depth view of the nodes hugging the stomach’s arteries and the pancreas.
Wristed instruments
Fine, wrist-like movement makes the meticulous D2 dissection safer and more complete.
Tremor filtration
Steady, scaled motion protects the delicate pancreas surface during node clearance.
Fewer pancreatic problems
Some series report less pancreatic leak and intra-abdominal infection than laparoscopy.
Less blood loss
Precise dissection means less bleeding and a clearer operative field.
Faster recovery
Smaller incisions and less trauma support earlier eating and recovery.
The Evidence

Treatment options — what the trials show

Modern stomach cancer care rests on strong evidence — for thorough D2 surgery, for chemotherapy around the operation, and for targeted and immune therapies in advanced disease.

Dutch D1D2 Trial
Lancet Oncology, 2010 (15-yr)
The landmark trial establishing D2 as the standard. At 15 years, D2 lymphadenectomy reduced gastric-cancer-related death (37% vs 48%) and locoregional recurrence (local 12% vs 22%) compared with D1 — leading to global consensus that D2, with spleen and pancreas preserved, is the standard of care.
FLOT4 Trial
Lancet, 2019
Perioperative FLOT chemotherapy (before and after surgery) improved median overall survival to about 50 months versus 35 months with the older regimen for resectable gastric and junctional cancer — now a standard.
Robotic Gastrectomy
RCTs & meta-analyses
Robotic gastrectomy with D2 dissection achieves the same lymph node yield and cancer clearance as laparoscopy, with less blood loss and, in several series, fewer pancreas-related and infectious complications — confirming it as safe and effective.
CLASSIC Trial
Lancet, 2012
After D2 surgery, adjuvant chemotherapy (capecitabine plus oxaliplatin) significantly improved disease-free survival — supporting chemotherapy alongside good surgery.
ToGA Trial
Lancet, 2010
For HER2-positive advanced stomach cancer, adding the targeted drug trastuzumab to chemotherapy improved survival — making HER2 testing routine.
CheckMate 649
Lancet, 2021
Adding immunotherapy (nivolumab) to chemotherapy improved survival in advanced stomach and junctional cancer, particularly when PD-L1 is expressed.

References: Dutch D1D2 — Songun I et al., Lancet Oncol 2010;11:439–449. FLOT4 — Al-Batran SE et al., Lancet 2019. CLASSIC — Bang YJ et al., Lancet 2012. ToGA — Bang YJ et al., Lancet 2010. CheckMate 649 — Janjigian YY et al., Lancet 2021. This information is educational and does not replace a personal consultation.

Patient Questions

Frequently asked questions — stomach cancer

What is D2 lymphadenectomy and why does it matter?+

D2 means removing not just the lymph nodes immediately around the stomach (D1) but also those running along the major arteries that supply it. Because stomach cancer spreads to these nodes, a thorough D2 dissection lowers the chance of the cancer coming back. The Dutch trial showed D2 reduces recurrence and gastric-cancer death, which is why it is the world standard.

Is robotic gastrectomy better than laparoscopic or open surgery?+

All three can remove the cancer with a D2 dissection. Robotic surgery offers a magnified 3D view and wristed instruments that are particularly helpful for the delicate node clearance around the pancreas and major arteries — with less blood loss, faster recovery and the same cancer clearance. Open surgery remains appropriate for some very advanced tumours.

Will I need chemotherapy?+

Usually, yes, for tumours beyond the earliest stage. The FLOT regimen given before and after surgery improves cure rates. Targeted therapy (for HER2-positive cancers) or immunotherapy may be added in advanced disease.

Will my whole stomach be removed?+

Not always. For tumours in the lower stomach, only the lower part is removed (distal gastrectomy), preserving the upper stomach. Total gastrectomy — removing the whole stomach — is needed for upper, diffuse or extensive tumours.

How will I eat after the operation?+

You can eat normally again, but in smaller, more frequent meals, especially after a total gastrectomy. A dietitian supports you through the adjustment. After total gastrectomy you will need lifelong vitamin B12 injections, and iron levels are monitored.

Is stomach cancer caused by infection, and is it hereditary?+

Most stomach cancer is linked to long-standing Helicobacter pylori infection and to diet — treating the infection lowers risk. A small proportion is inherited (for example the CDH1 gene causing hereditary diffuse gastric cancer); families with a strong history should seek genetic counselling.

Book a Consultation

Stomach cancer consultation, Pune

Bring your endoscopy and biopsy report, CT and any PET-CT. Dr. Gore reviews everything personally, coordinates your perioperative plan, and explains the robotic D2 surgical options for your tumour.

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