Published Oct 27, 2022

 

After a stomach cancer diagnosis, one of the first questions many patients ask is, “What stage is my cancer?” The stage of stomach cancer describes how far the disease has progressed, including how deeply it has grown into the stomach wall, whether it has spread to nearby lymph nodes, and whether cancer has spread to other parts of the body.1,2

Understanding the 5 stages of stomach cancer helps physicians evaluate the extent of the cancer, develop a personalized treatment plan, and discuss appropriate alternative treatments for stomach cancer. While a higher cancer stage generally indicates more advanced disease, every patient’s diagnosis is unique, and treatment recommendations are based on several factors beyond staging alone.

What Is Stomach Cancer Staging?

Stomach cancer staging is the process physicians use to describe how much cancer has grown, whether it remains inside the stomach, or whether it has spread to nearby tissues or distant organs. The stage of a cancer is determined after diagnostic testing and helps guide treatment planning.1

To determine the stage of the cancer, physicians evaluate:

  • How deeply the tumor has grown into each layer of the stomach wall.
  • Whether cancer has spread to nearby lymph nodes.
  • Whether cancer has spread beyond the stomach to other organs.
  • The overall extent of the cancer throughout the body.

Together, this information helps physicians recommend the most appropriate cancer treatment based on the patient’s diagnosis and overall health.

How Is the Stage of Stomach Cancer Determined?

Before assigning a stage, physicians perform several tests to diagnose stomach cancer and understand how far the disease has progressed. These tests provide information about the primary tumor, nearby lymph nodes, and whether cancer may have spread to other areas of the body.1,3

Common diagnostic tests include:

Upper Endoscopy

An upper endoscopy allows physicians to examine the inner lining of the stomach using a thin, flexible tube with a camera. If abnormal tissue is found, a biopsy can often be performed during the same procedure.1,4

Biopsy

If stomach cancer symptoms are present, specialized tools are inserted into the endoscope tube to get a tissue sample. The tissue sample is examined by a pathologist, who determines the type of stomach cancer and helps confirm the diagnosis of stomach cancer.4

Endoscopic Ultrasound (EUS)

Endoscopic ultrasound helps physicians determine whether the tumor has grown deeper into the stomach wall and evaluate nearby lymph nodes. This information is particularly helpful when determining the stage of your cancer.3,4

Imaging Tests

Additional imaging studies may include:

  • CT scan
  • PET scan
  • MRI
  • Upper gastrointestinal (GI) series
  • Blood tests

These tests help physicians determine whether cancer has spread outside the stomach and whether other organs have been affected by cancer.1,3

Your health is our priority. Contact us!

What Is the TNM Staging System?

The most widely used system for determining the stage of stomach cancer is the American Joint Committee on Cancer (AJCC) TNM staging system.1,2

TNM stands for:

T: Tumor

The T stage describes how far the primary tumor has grown through the stomach and into each layer of the stomach.

N: Nodes

The N stage indicates whether cancer has spread to nearby lymph nodes, including how many lymph nodes near the stomach contain cancer cells.

M: Metastasis

The M stage describes whether the disease has spread beyond the stomach to distant organs. When this occurs, the disease is considered metastatic cancer, also called metastatic stomach cancer.1,2

After evaluating all three categories, physicians assign an overall cancer stage, ranging from Stage 0 through Stage 4 stomach cancer.

The 5 Stages of Stomach Cancer

After the TNM system is used to evaluate the tumor, physicians assign an overall stage of stomach cancer. The 5 stages of stomach cancer range from Stage 0 to Stage 4, with each stage describing how far the disease has progressed.

In general, a lower cancer stage means the tumor is more localized, while a higher stage indicates that cancer has spread to nearby lymph nodes or other parts of the body.1,2

Stage 0 Stomach Cancer

Stage 0 is the earliest stage of stomach cancer and is also known as carcinoma in situ. At this stage, abnormal cancer cells are found only in the innermost layer of the stomach and have not grown deeper into the stomach wall or spread to nearby lymph nodes or distant organs.1

Because the disease is detected at a very early stage, understanding how to detect stomach cancer may help physicians identify it sooner, when more treatment options are available before the cancer becomes invasive.

Typical TNM classification:

  • Tis
  • N0
  • M0

Stage 1 Stomach Cancer

During Stage 1 stomach cancer, the tumor has begun growing beyond the inner lining of the stomach, but the disease is still considered localized.

Stage IA

In Stage IA, cancer has grown into the stomach lining or the first layer of the stomach wall but cancer has not spread to nearby lymph nodes or distant organs.

Typical TNM:

  • T1
  • N0
  • M0

Stage IB

In Stage IB, either:

  • The tumor has spread to 1 or 2 nearby lymph nodes while remaining within the early layers of the stomach, or
  • The tumor has reached the muscle layer of the stomach without lymph node involvement.

Although stage 1 stomach cancer remains localized, physicians begin paying closer attention to whether cancer has spread to nearby lymph nodes when developing a treatment plan.1,2

Stage 2 Stomach Cancer

During Stage 2 stomach cancer, the tumor has usually grown deeper into the stomach wall, or cancer has spread to nearby lymph nodes, but cancer has not spread to distant organs.1,2

Stage IIA

Stage IIA generally means one of the following:

  • The tumor remains in the inner layers of the stomach but has spread to 3–6 nearby lymph nodes
  • Cancer has grown into the muscle layer of the stomach or outer muscular layer with 1 or 2 nearby lymph nodes affected
  • The tumor has grown through the muscle layer and into the connective tissue outside the stomach, but lymph nodes are not affected

Stage IIB

Stage IIB generally means the cancer has become more extensive but is still localized to the stomach region. This may include:

  • The tumor remains in the early layers of the stomach but has spread to 7 or more lymph nodes near the stomach
  • Cancer has grown into the outer layer of the stomach wall with 3–6 nearby lymph nodes affected
  • The tumor has grown through the stomach wall and into the surrounding connective tissue with limited lymph node involvement
  • The tumor has reached the outer layer of the stomach, but cancer has not spread to distant organs

Although Stage 2 stomach cancer is more advanced than Stage 1, it is still considered potentially localized because cancer has not spread beyond the stomach to distant sites.1,2

Stage III Stomach Cancer

Stage 3 stomach cancer indicates that the disease is locally advanced. At this stage, the tumor has typically grown through multiple layers of the stomach and/or cancer has spread to nearby lymph nodes, but it has not spread beyond the stomach to distant organs.1,2

Stage IIIA

Stage IIIA generally means the stomach cancer has grown deeper into the stomach wall and has spread to nearby lymph nodes, but there is still no evidence of distant metastasis.

This stage may include:

  • The tumor has reached the muscle layer of the stomach with 7 or more lymph nodes affected
  • The tumor has grown through the stomach wall and into nearby connective tissue with 3–6 nearby lymph nodes involved
  • The tumor has reached the outer layer of the stomach with limited lymph node involvement
  • The tumor has grown through the stomach wall and into nearby structures, but cancer has not spread to distant organs

Stage IIIB

In Stage IIIB, the disease has progressed further, with more extensive lymph node involvement or deeper local invasion.

This stage may include:

  • Cancer involving 16 or more lymph nodes near the stomach
  • The tumor has grown through the stomach wall and into surrounding connective tissue with 7–15 lymph nodes affected
  • The tumor has reached the outer layer of the stomach or nearby structures but remains outside the stomach without distant metastasis

Stage IIIC

Stage IIIC is the most advanced form of Stage 3 stomach cancer. At this stage, stomach cancer has grown through the wall of the stomach and into nearby tissues or organs, with extensive lymph node involvement. However, cancer has not spread to distant parts of the body.1,2

This stage may include:

  • The tumor has grown through all layers of the stomach with 16 or more lymph nodes affected
  • Cancer has spread to nearby lymph nodes after growing into adjacent organs or structures, but there is still no distant metastasis

Although cancer is advanced, physicians have not found cancer that has spread beyond the stomach, which distinguishes Stage III stomach cancer from Stage 4 stomach cancer.

Stage 4 Stomach Cancer

Stage 4 stomach cancer is the most advanced stage of stomach cancer. At this point, stomach cancer has spread beyond the stomach to distant organs or tissues. This is also called metastatic stomach cancer or metastatic cancer.1,2

When cancer has spread beyond the stomach, it may affect organs such as the:

  • Liver
  • Lungs
  • Peritoneum (lining of the abdominal cavity)
  • Distant lymph nodes
  • Other areas of the body

Instead, cancer cells may travel through the bloodstream or lymphatic system and spread to distant parts of the body. Treatment for Stage 4 stomach cancer is individualized and depends on the extent of the cancer, the patient’s overall health, and the goals of care.1,2,5

Although cancer is advanced, treatment is still individualized. Depending on the patient’s overall health, treatment goals, and the extent of the cancer, physicians may recommend therapies designed to shrink the cancer, help manage symptoms, slow disease progression, and improve quality of life.1,3

Typical TNM classification:

  • Any T
  • Any N
  • M1

How Does the Stage of Stomach Cancer Affect Treatment?

Once physicians determine the stage of your cancer, they use that information to develop a personalized treatment plan. The stage of stomach cancer helps guide treatment recommendations by showing how deeply the tumor has grown, whether cancer has spread to nearby lymph nodes, and whether cancer has spread beyond the stomach. 

Along with the stage of the disease, physicians also consider the patient’s overall health, the type of stomach cancer, and individual treatment goals when recommending the most appropriate treatment approach.1,3,5

In general:

  • Stage 0 and Stage 1 stomach cancer are often managed with treatments designed to remove the cancer before it spreads.
  • Stage 2 stomach cancer and Stage 3 stomach cancer usually require more comprehensive treatment because the tumor has grown deeper into the stomach wall or cancer has spread to nearby lymph nodes.
  • Stage 4 stomach cancer often requires individualized treatment strategies that focus on managing metastatic cancer, helping shrink the cancer, and supporting quality of life, and addressing symptoms based on the patient’s overall condition and treatment goals.5

Every patient’s diagnosis is unique. Factors such as the type of stomach cancer, overall health, and treatment goals all influence the most appropriate stomach cancer treatment options.1,3,5

Personalized Alternative Cancer Care at Immunity Therapy Center

Receiving a stomach cancer diagnosis can feel overwhelming, but understanding your treatment options is an important next step.

A Immunity Therapy Center (ITC), we develop individualized treatment plans based on the stage of the cancer, overall health, and each patient’s unique needs. Our physicians provide evidence-informed alternative treatments that focus on addressing stomach cancer while supporting the body’s natural healing processes through non-invasive and minimally invasive therapies.

Our personalized programs also provide natural pain relief for stomach cancer while helping patients manage symptoms, support immune function, and improve overall quality of life throughout treatment. Every recommendation is tailored to your individual diagnosis rather than following a one-size-fits-all approach.

Learn More About Stomach Cancer Treatment Options

Whether you have recently been diagnosed with stomach cancer, are seeking a second opinion, or want to better understand the stage of your cancer, our medical team is here to help.

Schedule a free consultation with Immunity Therapy Center to discuss your diagnosis, ask questions about your alternative cancer treatment options, and learn how our personalized approach may support your individual needs. We are committed to helping you make informed decisions about your care every step of the way.

Frequently Asked Questions

What is the most advanced stage of stomach cancer?

Stage 4 stomach cancer is the most advanced stage. At this point, stomach cancer has spread beyond the stomach to distant organs such as the liver, lungs, or the lining of the abdominal cavity. This is also called metastatic stomach cancer.1,2

Can Stage 1 stomach cancer be treated?

Many patients with Stage 1 stomach cancer have treatment options because the disease is still localized. The most appropriate treatment depends on the patient’s overall health, tumor location, the stage of the cancer, and other individual factors that help physicians develop a personalized treatment plan.1,5

Does Stage 3 stomach cancer mean the cancer has spread?

Yes, Stage 3 stomach cancer usually means the tumor has spread through multiple layers of the stomach and/or to nearby lymph nodes. However, unlike Stage 4 stomach cancer, the disease has not spread beyond the stomach to distant organs.1,5

How do doctors determine the stage of stomach cancer?

Doctors determine the stage of stomach cancer using imaging studies, upper endoscopy, biopsy, and the American Joint Committee on Cancer TNM staging system..  These tests help physicians understand the extent of the cancer and develop an appropriate treatment plan.1,2

 

Sources:

  1. American Cancer Society. Stages of Stomach Cancer.https://www.cancer.org/cancer/types/stomach-cancer/detection-diagnosis-staging/staging.html
  2. Memorial Sloan Kettering Cancer Center. Stages of Stomach (Gastric) Cancer.https://www.mskcc.org/cancer-care/types/stomach-gastric/diagnosis/stages
  3. Cancer Research UK. Stages of Stomach Cancer.https://www.cancerresearchuk.org/about-cancer/stomach-cancer/stages
  4. American Cancer Society. Upper Endoscopy.https://www.cancer.org/treatment/understanding-your-diagnosis/tests/endoscopy/upper-endoscopy.html
  5. National Cancer Institute. Gastric (Stomach) Cancer Treatment (PDQ®) – Patient Version.https://www.cancer.gov/types/stomach/patient/stomach-treatment-pdq

 

At Immunity Therapy Center, all blog content is created to provide high-quality, unbiased, and reliable health information. Each article is written by experienced medical experts, researched using credible medical sources, reviewed for accuracy, fact-checked, and evaluated by ITC’s medical professionals. Our editorial process is designed to reflect current evidence-based information and uphold strong editorial standards.

Articles also include credible third-party sources, listed at the bottom of each page, so readers can access the original source material directly.