What are the treatment options for glioblastoma

Treatment Options for Glioblastoma

I understand you're looking for information about glioblastoma treatment. This is a serious diagnosis, and I want to provide you with clear, evidence-based information from trusted medical guidelines.

Understanding Glioblastoma

According to the NCCN (National Comprehensive Cancer Network) Guidelines, glioblastomas are fast-growing and aggressive grade 4 tumors—the most common and most dangerous type of malignant brain tumor in adults. Because glioblastomas grow quickly and invade deeply into surrounding brain tissue, they require prompt diagnosis and treatment.

Primary Treatment Approach

1. Surgery (Tumor Resection)

The first step in treating glioblastoma is surgery to remove as much of the tumor as safely possible. According to NCCN Guidelines, the main goals are to:

• Relieve pressure on the brain
• Remove as much tumor tissue as possible (called "maximal safe resection")

However, because glioblastoma cells invade so deeply into brain tissue, removing the entire tumor isn't possible. This is why additional treatments are always needed after surgery.

2. Additional (Adjuvant) Treatment

After surgery, the NCCN strongly recommends that people with glioblastoma consider joining a clinical trial as part of their treatment plan. Clinical trials may offer access to newer therapies and approaches.

If a clinical trial isn't available or suitable, standard adjuvant treatment typically involves radiation therapy plus chemotherapy, often with other therapies added.

Treatment Options Based on Age and Physical Condition

The NCCN Guidelines recognize that treatment intensity should be tailored to each person's situation. Here's how treatment typically varies:

For Adults Under Age 70 with Good Physical Capability

People who are younger and have good performance status (ability to carry out daily activities) can generally handle more intensive treatment. Options include:

• Radiation therapy and temozolomide chemotherapy given together, followed by more temozolomide chemotherapy, plus tumor treating fields (TTFields)—a device that uses electrical fields to disrupt cancer cell division

• Radiation therapy and temozolomide chemotherapy given together, followed by additional temozolomide chemotherapy

• Radiation therapy and lomustine/temozolomide chemotherapy given together, followed by more chemotherapy

• Radiation therapy alone

For Adults Under Age 70 with Limited Physical Capability

If you have lower performance status (more difficulty with daily activities), less intense treatment may be recommended:

• Hypofractionated radiation therapy (larger doses given in fewer sessions) with or without temozolomide chemotherapy

• Temozolomide chemotherapy only

• Supportive (palliative) care focused on quality of life

For Adults Over Age 70

According to NCCN Guidelines, older adults often receive modified treatment because they may have additional health problems, reduced physical capability, or greater risk of side effects. However, some adults over 70 can tolerate more intensive treatment and achieve good results.

With good physical capability:

• Hypofractionated radiation therapy and temozolomide chemotherapy together, followed by more temozolomide
• Temozolomide chemotherapy only
• Hypofractionated radiation therapy only

With limited physical capability:

• Hypofractionated radiation therapy only
• Temozolomide chemotherapy only
• Supportive care

Important Biomarker: MGMT Promoter Methylation

The NCCN Guidelines note that nearly half of glioblastomas have something called MGMT promoter methylation—a biomarker (biological characteristic) that's important for treatment decisions. Glioblastomas with a methylated MGMT promoter tend to respond better to temozolomide chemotherapy and are associated with longer survival compared to those with an unmethylated MGMT promoter.

Follow-Up Care

After treatment, you'll need regular MRI scans to monitor whether the glioblastoma is under control and to check for side effects. According to NCCN Guidelines, scans are typically scheduled:

• Every 2 to 4 months initially
• Then 3 to 6 times per year if there's no recurrence

What About Recurrence?

The NCCN Guidelines acknowledge that glioblastoma will likely come back eventually or may continue to grow despite treatment. When this happens, additional treatment options are available, which your care team will discuss with you.

Focus on Quality of Life

According to NCCN Guidelines, your quality of life should be the main priority guiding your treatment and care. Successful treatment isn't just about reducing the tumor—it also includes:

• Minimizing cognitive (thinking and memory) problems
• Reducing pain
• Lowering anxiety and stress
• Maintaining ability to do regular activities
• Spending time with friends and family
• Enjoying life as much as possible

Next Steps

I strongly encourage you to:

1. Discuss these options with your multidisciplinary care team, which should include neurosurgeons, neuro-oncologists, radiation oncologists, and other specialists
2. Ask about clinical trials that might be appropriate for your situation
3. Request molecular testing of your tumor, including MGMT promoter status
4. Consider getting a second opinion from a comprehensive cancer center

Your treatment team will help you determine the best approach based on your specific situation, including the tumor's location, your age, overall health, and personal preferences.

Sources cited:

• NCCN (National Comprehensive Cancer Network) Guidelines for Patients: Glioma, 2024

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