What does stable disease mean on my Ovarian Cancer scan results

Understanding "Stable Disease" on Your Ovarian Cancer Scan

Great question—this is an important term to understand when reviewing your scan results. Let me explain what it means and how doctors use this information.

What "Stable Disease" Means

Stable disease means that your cancer has not grown significantly since your last scan, but it also has not shrunk. In other words, the tumors are staying roughly the same size—they're neither getting better nor worse at this moment.

Think of it like this: if your tumor measured 3 cm on your last scan and measures 3.1 cm on today's scan, that's considered stable. There's a small range of measurement variation that doctors allow for before they call it growth or shrinkage.

How Doctors Categorize Treatment Response

According to the NCCN Guidelines for Ovarian Cancer, doctors evaluate your response to treatment using these categories:

• Complete Response (CR): No evidence of disease visible on imaging
• Partial Response (PR): Tumors have shrunk by a meaningful amount
• Stable Disease: Tumors are not growing or shrinking significantly
• Progressive Disease: Tumors are growing

What Stable Disease Means for Your Treatment Plan

According to NCCN Guidelines, stable disease is an important finding because it affects your next treatment decisions. Here's what typically happens:

If you've just completed initial chemotherapy and surgery:

• Stable disease may make you eligible for maintenance therapy (ongoing treatment to keep the cancer controlled)
• Your doctor may recommend continuing with PARP inhibitors, bevacizumab, or other maintenance options depending on your specific situation

If you're already on treatment:

• Stable disease suggests your current treatment is working to control the cancer, even if it's not shrinking it
• Your oncologist may continue the same treatment plan

Important Questions to Ask Your Oncologist

Since stable disease can mean different things depending on your specific situation, here are key questions to discuss:

1. "Is stable disease considered a good response to my current treatment?" (This helps you understand if your treatment is working as expected)

2. "What does this mean for my next steps—should we continue, change, or add to my current treatment?"

3. "How often will we scan to monitor for any changes, and what would prompt a change in treatment?"

4. "Are there maintenance therapy options that might help prevent progression?" (This is especially relevant for ovarian cancer, where maintenance therapy after initial treatment is often recommended)

5. "What size change would be considered progression, and what size change would be considered response?" (This helps you understand the threshold your doctor is using)

Context Matters

Your doctor will consider several factors when interpreting stable disease:

• How long you've had stable disease (stable for 3 months vs. 12 months means different things)
• Your CA-125 tumor marker levels (if elevated initially, doctors track whether these are rising, stable, or falling)
• Your symptoms (whether you're feeling better, worse, or the same)
• Your BRCA status and other biomarkers (which may influence maintenance therapy options)
• What stage your cancer is (early stage vs. advanced stage)

According to NCCN Guidelines, patients with stable disease after primary treatment may be candidates for maintenance therapy, particularly if they have specific biomarkers like BRCA mutations or homologous recombination deficiency (HRD).

The Bottom Line

Stable disease is neither the best outcome nor the worst—it's a middle ground that tells your doctor your cancer is being controlled, at least for now. It's a signal to continue monitoring closely and often to consider maintenance therapy to try to prevent progression.

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

Sources: NCCN Guidelines for Epithelial Ovarian Cancer/Fallopian Tube Cancer/Primary Peritoneal Cancer (Version 3.2025)