What happens if I choose no treatment for Sarcoma

Understanding the "Watch and Wait" Approach for Sarcoma

This is an important question, and the answer depends significantly on what type of sarcoma you have and how advanced it is. Let me explain what the medical evidence shows.

When Observation Alone Might Be Considered

According to the NCCN Guidelines for Soft Tissue Sarcoma, there are specific situations where doctors may recommend observation (careful monitoring without immediate treatment):

Desmoid Tumors (Aggressive Fibromatosis): The NCCN Guidelines note that spontaneous regression has been reported in about 20% of patients with desmoid tumors, which supports an initial period of observation in newly diagnosed cases. For desmoid tumors in locations where progression wouldn't cause serious problems, observation with regular imaging every 3 months is a reasonable option, even if the tumor shows some growth.

Low-Grade, Indolent Tumors: For certain slow-growing sarcomas like atypical lipomatous tumors (ALT) or well-differentiated liposarcoma in the extremities, observation may be considered if the tumor is small and resection would cause significant disability.

What Happens Without Treatment: The Risks

However, for most sarcomas, choosing no treatment carries significant risks:

Local Progression:

• The tumor can grow larger and invade surrounding tissues, nerves, and blood vessels
• This makes future surgery more difficult and may eventually make the tumor unresectable (unable to be safely removed)
• Larger tumors are harder to treat and have worse outcomes

Metastatic Disease (Spread):

• Untreated sarcomas can spread to distant sites, most commonly the lungs
• Once sarcoma spreads to other parts of the body, treatment becomes much more challenging
• The NCCN Guidelines emphasize that early treatment of the primary tumor is important for preventing distant spread

Functional Decline:

• As the tumor grows, it may cause pain, loss of function, and reduced quality of life
• Waiting can sometimes mean that by the time treatment begins, more aggressive approaches (like amputation) may be necessary

The Medical Evidence on Treatment Benefit

The NCCN Guidelines document that for resectable sarcomas (tumors that can be surgically removed):

• Surgery with appropriate margins is the standard approach
• Combined with radiation therapy when needed, this provides the best chance for local control
• For advanced or metastatic disease, chemotherapy and other systemic therapies have shown survival benefits

Important Questions to Ask Your Doctor

If you're considering no treatment, these questions are essential:

1. What type and grade of sarcoma do I have? (This determines how aggressive it is)
2. What is the current size and location of my tumor? (This affects treatment options and urgency)
3. What would happen if we observed my tumor for 3-6 months with imaging? (Some tumors grow slowly; others progress rapidly)
4. If I choose observation now, would treatment still be possible later? (This is crucial—some tumors become unresectable if they grow)
5. What are the specific risks for MY sarcoma if left untreated? (Risk varies greatly by type)
6. Are there treatment options that would preserve function while controlling the disease? (Modern surgery and radiation aim to balance cancer control with quality of life)

The Bottom Line

While observation is sometimes appropriate for specific sarcoma types in specific situations, most sarcomas benefit from early treatment. The NCCN Guidelines emphasize that treatment decisions should be individualized based on:

• Your specific sarcoma type and grade
• Tumor size and location
• Whether it's resectable
• Your overall health and functional goals

Choosing no treatment is a significant decision that requires detailed discussion with your sarcoma specialist about YOUR specific situation and the natural history of YOUR particular tumor.

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