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The Different Stages of Stomach Cancer: From Diagnosis to Treatment

31 Oct, 2023

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Stomach cancer, also known as gastric cancer, is a formidable adversary in the world of oncology. Its progression is marked by distinct stages, each with its own set of challenges and treatment options. This article delves deep into the journey of a stomach cancer patient, from the moment of diagnosis to the various treatment modalities.

Stomach cancer originates in the inner lining of the stomach and can spread through the layers of the stomach to the outermost layer. It's crucial to detect and treat it early, as its prognosis worsens with progression.

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1. Diagnosis: The First Step


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The initial phase in the battle against stomach canceris its diagnosis. Recognizing the signs early can make a significant difference in the prognosis and treatment options. Here's a closer look at the symptoms and diagnostic tools used to identify stomach cancer:


a. Symptoms Alerting to Possible Stomach Cancer


While symptoms can vary among individuals, some common indicators that might hint at stomach cancer include:

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  • Persistent Indigestion: Continuous discomfort or burning sensation in the upper abdomen, often after eating.
  • Stomach Pain: A gnawing or sharp pain in the mid-upper abdomen.
  • Unexplained Weight Loss: Rapid and unintentional weight loss without any changes in diet or exercise.
  • Difficulty Swallowing: Feeling that food gets stuck in the throat or chest, leading to pain or choking.

It's essential to note that these symptoms can also be associated with other less severe conditions. However, if they persist or are bothersome, it's crucial to seek medical advice.


b. Diagnostic Procedures


Once these symptoms raise concerns, healthcare professionals employ various diagnostic tools to confirm the presence of stomach cancer:

  • Endoscopy: This procedure involves inserting a thin, flexible tube equipped with a light and camera (endoscope) down the patient's throat. The endoscope allows the doctor to view the inner lining of the stomach, looking for any abnormalities or growths.
  • Biopsy: If suspicious areas are identified during the endoscopy, the doctor might take small tissue samples using special tools passed through the endoscope. These samples, known as biopsies, are then analyzed under a microscope to determine the presence of cancerous cells.
  • Imaging Tests: These tests provide detailed pictures of the body's internal structures, aiding in locating and determining the extent of the tumor:
    • CT Scans: Using X-rays from different angles combined with computer processing, CT scans create cross-sectional images of the body. This helps doctors see the stomach and surrounding organs in detail.
    • MRI: Magnetic Resonance Imaging uses magnetic fields and radio waves to produce detailed images of organs and tissues. It's especially useful for viewing soft tissues.
    • PET Scans: In a PET scan, a small amount of radioactive glucose is injected into the patient's body. Since cancer cells absorb glucose at a higher rate than normal cells, they appear brighter on the scan, helping identify cancerous regions.

Early and accurate diagnosis is pivotal in the fight against stomach cancer. These diagnostic tools, combined with a patient's symptom history, play a crucial role in determining the best course of action for treatment.


2. Staging: Assessing the Magnitude of Spread

Staging is a pivotal aspect of the cancer treatment journey. It provides a structured framework to understand the extent of cancer's spread, guiding clinicians in formulating the most effective treatment strategy. Let's delve into the intricacies of the staging process for stomach cancer:


a. Purpose of Staging


Staging serves multiple purposes:

  • Determining Prognosis: The stage of cancer often correlates with the patient's prognosis or expected outcome.
  • Guiding Treatment Decisions: Different stages may require different treatment modalities or combinations thereof.
  • Evaluating Treatment Success: Staging can be revisited post-treatment to assess the effectiveness of the intervention.

b. Stages of Stomach Cancer


The progression of stomach cancer is categorized into distinct stages, each indicating the depth of invasion and the extent of spread:

  • Stage 0 (Carcinoma in Situ): At this earliest stage, cancer cells are confined solely to the innermost lining of the stomach. They haven't invaded deeper tissues or spread elsewhere. The term "in situ" translates to "in its original place.
  • Stage I: This stage indicates a deeper invasion into the stomach layers but without affecting nearby lymph nodes or other organs. It's further subdivided into:
    • IA: The cancer remains restricted to the second or third layer of the stomach wall and hasn't reached the lymph nodes.
    • IB: Two scenarios can define this sub-stage. Either the cancer has penetrated the second or third layer and involves nearby lymph nodes, or it has advanced to the fourth layer without affecting the lymph nodes.
  • Stage II: Here, the cancer has either delved even deeper into the stomach walls or has affected a greater number of lymph nodes. It still hasn't shown signs of distant spread.
  • Stage III: This stage denotes a more aggressive spread. The cancer might have encompassed a larger portion of the stomach or involved many adjacent lymph nodes. However, distant organs remain unaffected.
  • Stage IV: This is the most advanced stage of stomach cancer. The malignancy has metastasized, meaning it has spread beyond the stomach to distant organs. Common sites for metastasis include the liver, lungs, and bones.


3. Treatment Modalities for Stomach Cancer


Stomach cancer, like other malignancies, requires a multifaceted approach to treatment. The chosen modality often hinges on the stage of the disease, the patient's overall health, and other individual factors. Here's an in-depth look at the primary treatment modalities for stomach cancer:


a. Surgery


Surgical intervention remains a cornerstone in the management of stomach cancer, especially in its early stages.

  • Subtotal Gastrectomy: In this procedure, only a portion of the stomach, typically the part where the tumor is located, is removed. The remaining section is then reconnected to the esophagus and small intestine. This approach is often suitable for tumors located at the lower part of the stomach.
  • Total Gastrectomy: For tumors that are more widespread or located in the upper part of the stomach, the entire stomach may need to be removed. The esophagus is then directly connected to the small intestine.

b. Chemotherapy


Chemotherapy harnesses powerful drugs to target and destroy cancer cells. It plays a pivotal role in both localized and advanced stages of stomach cancer.

  • Neoadjuvant Chemotherapy: Administered before surgery, this approach aims to shrink the tumor, making it easier to remove and reducing the risk of leaving behind cancerous cells during surgery.
  • Adjuvant Chemotherapy: Post-surgical treatment aims to destroy any residual cancer cells, reducing the risk of recurrence.

c. Radiation Therapy

Radiation therapy uses high-energy rays to target and annihilate cancer cells. It can be employed as a standalone treatment or in conjunction with other modalities. Often, radiation is combined with chemotherapy in a regimen known as chemoradiation. This dual approach can be particularly effective in shrinking tumors before surgery or targeting remaining cells afterward.


d. Targeted Therapy


Unlike traditional chemotherapy, which affects all rapidly dividing cells, targeted therapies are designed to attack specific molecules or pathways that cancer cells exploit for growth.

  • Trastuzumab: This drug specifically targets the HER2 protein, which is overexpressed in some stomach cancers. By binding to this protein, Trastuzumab can slow or halt the growth of these cancer cells.

e. Immunotherapy


Immunotherapy is a groundbreaking approach that amplifies the body's natural defense mechanisms to combat cancer. By targeting specific checkpoints or markers on cancer cells, these drugs can either enhance the immune system's ability to recognize and destroy cancer cells or introduce lab-engineered immune cells to target the malignancy.


4. Personalized Treatment Plans

Every patient's journey is unique. Factors like age, overall health, and the cancer's location and stage play a role in determining the best treatment plan. Multidisciplinary teams comprising surgeons, oncologists, radiologists, and other specialists collaborate to devise the most effective strategy.



Beyond medical interventions, emotional and psychological support is paramount. Support groups, counseling, and palliative care can help patients and families cope with the challenges of stomach cancer.

Stomach cancer is challenging, but with early detection and advanced treatments, there's hope. Collaboration with healthcare professionals and staying informed are key. As medical research progresses, the future for those affected looks increasingly promising.

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Stomach cancer, also known as gastric cancer, originates in the inner lining of the stomach and can progress through its layers.