How Risky Is Meningioma Surgery? A Comprehensive Overview

Brain surgery can be an intimidating prospect, and when faced with a meningioma diagnosis, many patients find themselves grappling with questions about surgical risks. 

brown brain decor in selective-focus photography

Meningiomas are typically benign tumors that develop in the meninges, the protective layers surrounding the brain and spinal cord. Their treatment often requires careful consideration of surgical intervention.

Understanding the associated risks and success rates of meningioma surgery is crucial for patients and their families as they navigate treatment decisions. In this article, we will explore the various risk factors involved in meningioma surgery.

Overview of Meningioma

Meningioma is a growth that develops in the meninges. These are three specialized layers of tissue that wrap around and shield the brain and spinal cord. The tumors start in arachnoid cells, which are found in the middle layer of the meninges and are known for their delicate, web-like structure.

While approximately 80% of meningiomas are benign (non-cancerous), their location and size can still pose significant health risks. As per Cleveland Clinic, these tumors typically develop along the brain's surface or at the skull base, with spinal cases being uncommon. 

Meningiomas are classified into three grades:

  • Grade I: Slow-growing and benign (80% of cases).
  • Grade II: More aggressive but still non-cancerous (17%).
  • Grade III: Fast-growing and cancerous (1.7%).

What Causes Meningioma?

The exact cause is unclear, but abnormalities in chromosome 22, responsible for tumor suppression, are found in 40-80% of cases. These genetic changes are typically random but can occasionally be inherited.

Another possibility is from the contraceptive medication Depo Provera. Research indicates that the birth control injectable may raise the risk of meningiomas. The danger increases with Depo use for more than a year. 

The issue is so concerning that people have been filing the Depo-Provera lawsuit against manufacturers, alleging harm caused by the contraceptive.

According to TruLaw, the primary legal claim is that Pfizer failed to provide adequate warnings about Depo-Provera. Users and healthcare providers were not properly informed about the potential risk of brain tumors associated with its use.

For those looking for dependable and low-maintenance birth control, the medication was marketed as a practical solution that only required four injections each year.

Is Meningioma Surgery Risky?

Meningioma surgery, while carrying inherent risks like any medical procedure, is generally well-established with encouraging outcomes.

Research demonstrates strong survival rates, with over 80% of patients living beyond 5 years post-surgery and more than 70% reaching the 10-15 year mark. 

The positive statistics result from the tumor's usual location outside the brain tissue. Aaron Cohen-Gadol says this positioning allows surgeons to access and remove the growth without significantly disrupting critical brain structures.

However, patients should be aware of potential complications, which can include:

  • Bleeding: Bleeding can occur during or after surgery and may require a blood transfusion or another operation. 
  • Brain swelling: Brain swelling can lead to brain damage. 
  • Injury to cranial nerves: Depending on the tumor's location, this can affect your sight, ability to move your face, or ability to swallow. 
  • Fluid buildup: Fluid buildup around the brain can lead to brain damage. 
  • Accidental brain tissue damage: This can cause issues with your ability to think, see, or speak. 
  • Seizures: Seizures can require medication and, in rare cases, can lead to epilepsy. 
  • Stroke: A small risk of stroke. 
  • Neurological injury: A small risk of significant neurological injury causing paralysis, coma, or death

The mortality rate for meningioma surgery is typically low. Most patients recover well, though recovery time varies from weeks to months. The overall success and safety of the procedure largely depend on the surgeon's expertise, the hospital's surgical volume, available technology, and thorough pre-surgical planning.

If Not Surgery, What Are the Other Treatment Options?

For some meningioma patients, surgery may not be the most suitable option. Fortunately, a few non-surgical alternatives are available to manage meningiomas effectively.

Radiation Therapy

Radiation therapy serves as a crucial alternative when complete meningioma removal isn't achievable through surgery. Advanced radiation systems deliver precise energy beams to destroy remaining tumor cells and prevent regrowth. Modern techniques allow for accurate targeting while protecting surrounding brain tissue.

Several specialized approaches are available. SRS (Stereotactic Radiosurgery) provides focused radiation in a single outpatient session lasting just hours. 

For tumors requiring gentler treatment, SRT (Fractionated Stereotactic Radiotherapy) splits the radiation into daily sessions across a month. IMRT (Intensity-Modulated Radiation Therapy) uses sophisticated computer control to treat complex tumor shapes near delicate brain regions.

Proton therapy represents another advancement in radiation treatment. This method utilizes hydrogen-derived protons accelerated through specialized cyclotron or synchrotron machines. As per Johns Hopkins, the system's rotating gantry focuses these particles into an extremely narrow 5mm beam using magnetic guidance. 

This precision targeting allows the beam to hit the tumor from multiple angles while adjusting energy levels to match the tumor's depth. The radiation disrupts tumor cell DNA, effectively destroying cancerous tissue while minimizing its impact on healthy cells.

Chemotherapy

Chemotherapy plays a limited role in meningioma treatment, with specific situations warranting its use. Since meningiomas typically grow slowly, standard chemotherapy drugs - designed to target rapidly dividing cells - often prove less effective.

The treatment becomes more relevant for aggressive, high-grade malignant meningiomas, though these cases are relatively rare.

As per Moffitt, several medication options exist when chemotherapy is deemed appropriate:

  • Hydroxyurea - an oral chemotherapy medication
  • Interferon-alfa 2B - a biological agent that helps control cell growth by regulating specific genes
  • Sandostatin - a specialized drug targeting cell surface receptors, particularly effective for recurring tumors with fewer side effects than traditional chemotherapy

Chemotherapy might be considered when:

  • Surgery isn't preferred by the patient
  • Tumor location makes surgical removal too risky
  • Traditional treatments prove ineffective

Clinical trials offer access to emerging treatments before widespread availability. These research studies continue advancing treatment options, testing new medications that may prove more effective than current standards. Patients interested in innovative treatments may consider participating in these trials under medical guidance.

FAQs

Q. What are the survival rates following meningioma surgery?

A: Survival statistics for non-cancerous meningiomas show encouraging trends across age groups based on tumor biopsy data. Five-year survival rates reach approximately 95% for children under 14, 91% for individuals aged 15-39, and 87% for adults over 40. These rates reflect successful surgical outcomes for benign meningiomas.

Q. What complications can arise after meningioma surgery?

A: Post-operative complications may include localized issues such as hematoma formation, infection risk, brain edema, and hydrocephalus. Some patients experience long-term neurological effects following complete tumor removal. Advanced age correlates with an increased risk of surgical complications and mortality rates, requiring careful monitoring during recovery.

Q. How effective are MRIs in identifying meningioma types?

A: MRI serves as the primary diagnostic tool for brain tumor detection, providing valuable insights into tumor characteristics. MRI technology can help distinguish between benign tumors like meningiomas and malignant ones such as gliomas. However, definitive tumor classification usually requires confirmation through a tissue biopsy.

The decision to undergo meningioma surgery represents a complex intersection of medical necessity, personal choice, and risk assessment. While modern surgical techniques and expertise have dramatically improved outcomes, each case demands individual consideration. 

As medical science advances, with options like proton therapy and targeted treatments emerging, we must remember that the "safest" choice isn't always the least invasive one. Sometimes, accepting short-term surgical risks may offer the best path to long-term health and quality of life. 

The key lies not in avoiding risk entirely but in making informed decisions that align with each patient's unique circumstances and values.

Kellee Maize Team

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