What happens if I choose no treatment for Stomach Cancer

Understanding the Progression of Untreated Stomach Cancer

This is an important question, and I want to give you honest, educational information about what typically happens when stomach cancer goes untreated. This will help you understand why your medical team may be recommending treatment options.

How Untreated Stomach Cancer Generally Progresses

Early-stage disease (if caught early): If your cancer is caught at an early stage (T1a or T1b, meaning it hasn't invaded deeply into the stomach wall), untreated cancer typically continues to grow deeper into the stomach tissue over time. According to NCCN Guidelines for Gastric Cancer, early-stage cancers that are not treated tend to progress to more advanced stages.

Locally advanced disease: Without treatment, the cancer will generally:

• Grow deeper through the stomach wall layers
• Spread to nearby lymph nodes (the body's immune system filters)
• Eventually invade surrounding organs (liver, pancreas, spleen)
• Potentially spread to distant sites (metastatic disease)

Advanced/metastatic disease: Once cancer spreads beyond the stomach, untreated disease typically progresses to:

• Peritoneal spread (cancer cells in the abdominal lining)
• Liver metastases (cancer in the liver)
• Other distant organ involvement
• Increasing symptoms like obstruction, bleeding, and pain

What Symptoms Develop Over Time

As untreated stomach cancer progresses, patients typically experience:

• Worsening difficulty swallowing or feeling of food getting stuck
• Persistent abdominal pain that becomes more severe
• Uncontrollable bleeding from the tumor (which can be life-threatening)
• Gastric obstruction (blockage preventing food from passing through)
• Severe weight loss and malnutrition
• Fatigue and weakness
• Ascites (fluid buildup in the abdomen)

The Timeline Question

The speed of progression varies significantly based on:

• Stage at diagnosis (how advanced it is)
• Grade (how aggressive the cancer cells appear under a microscope)
• Biomarkers (specific characteristics like MSI-H/dMMR status)
• Your overall health

Some cancers progress slowly over months, while others advance rapidly over weeks.

Palliative Care as an Alternative

If you're considering no active treatment, it's important to know that NCCN Guidelines recognize Palliative Management as an option. This doesn't mean "doing nothing"—it means:

• Managing pain and symptoms aggressively
• Addressing complications like bleeding or obstruction with procedures (endoscopic stenting, for example)
• Focusing on quality of life and comfort
• Nutritional support
• Psychological and spiritual support

According to NCCN Guidelines, even patients who decline curative treatment can receive interventions for symptom control, such as endoscopic procedures to relieve obstruction or manage bleeding.

Questions to Ask Your Oncology Team

Before making a decision about treatment, consider asking:

1. What is my specific stage and grade? This directly affects how quickly the cancer may progress.

2. What are my treatment options, and what would each accomplish? (Surgery, chemotherapy, radiation, or combinations)

3. If I choose no treatment now, can I change my mind later? (This varies by stage and your health status)

4. What palliative/comfort care options are available to me? (Even without curative treatment)

5. What symptoms should I watch for that would require urgent care? (Severe bleeding, complete obstruction, etc.)

6. How will we monitor my cancer if I choose observation? (Imaging, endoscopy, blood tests)

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Important Context

According to NCCN Guidelines for Gastric Cancer, treatment decisions depend heavily on:

• Whether your cancer is resectable (can be surgically removed)
• Your overall health and ability to tolerate treatment
• The specific characteristics of your tumor (biomarkers like MSI-H/dMMR, HER2, PD-L1, CLDN18.2)

This information is for educational purposes only. Always consult your healthcare team for personalized medical advice and decisions.

Your oncologist can give you specific information about YOUR cancer's characteristics and what to expect in YOUR particular situation. Every cancer is different, and your medical team has access to your complete clinical picture.