Ependymoma: Symptoms, Causes, Diagnosis, Treatment, and Prognosis

~Introduction

Ependymoma is a rare type of brain and spinal cord tumor that develops from ependymal cells, which line the ventricles of the brain and the central canal of the spinal cord. These cells are responsible for producing and circulating cerebrospinal fluid (CSF), making their role critical in maintaining normal brain function.

Although ependymomas account for a small percentage of all central nervous system (CNS) tumors, they are one of the most common brain tumors in children, particularly affecting infants and young children. In adults, ependymomas are more frequently found in the spinal cord.

This comprehensive guide explores ependymoma symptoms, causes, types, diagnosis, treatment options, survival rates, and prognosis, helping patients and caregivers understand this complex condition.

~What Is Ependymoma?

Ependymoma is a glial tumor arising from ependymal cells. It can occur anywhere along the ventricular system of the brain or the spinal cord, depending on age and tumor subtype.

Ependymomas are classified as primary central nervous system tumors, meaning they rarely spread outside the brain or spinal cord. However, they can spread within the CNS via cerebrospinal fluid pathways.

~Epidemiology and Prevalence

• Ependymomas represent 2–3% of all primary brain tumors

• They account for 6–10% of pediatric brain tumors

• Most commonly diagnosed in:

  • Children under 5 years of age

  • Adults aged 30–60 years

• Slight male predominance has been observed

~Types of Ependymoma

The World Health Organization (WHO) classifies ependymomas based on histology and molecular features.

1. Subependymoma (WHO Grade I)

• Slow-growing and benign

• Common in adults

• Often asymptomatic and discovered incidentally

• Usually located in brain ventricles

2. Myxopapillary Ependymoma (WHO Grade II)

• Typically occurs in the lower spinal cord

• Common in young adults

• Generally slow-growing but may recur

3. Classic Ependymoma (WHO Grade II)

• Can occur in brain or spinal cord

• Moderate growth rate

• Most common form in children

4. Anaplastic Ependymoma (WHO Grade III)

• High-grade and aggressive

• Faster growth and higher recurrence risk

• Requires intensive treatment

5. Molecular Subtypes (Modern Classification)

Recent advances identify molecular subgroups such as:

• Posterior fossa ependymoma (PFA and PFB)

• Supratentorial ependymoma (ZFTA fusion–positive)

These molecular features significantly impact prognosis and treatment decisions.

~Causes and Risk Factors

The exact cause of ependymoma is unknown, but several factors may increase risk:

Known Risk Factors

• Genetic conditions such as Neurofibromatosis Type 2 (NF2)

• Childhood exposure to radiation therapy

• Certain molecular and chromosomal abnormalities

What Does NOT Cause Ependymoma

• Lifestyle choices

• Diet or nutrition

• Mobile phone usage

• Environmental toxins (no proven link)

Most cases occur sporadically without a clear inherited cause.

~Symptoms of Ependymoma

Symptoms depend on tumor location, size, and patient age. They often result from increased intracranial pressure or spinal cord compression.

Common Brain Ependymoma Symptoms

• Persistent headaches

• Nausea and vomiting

• Seizures

• Vision problems

• Balance and coordination difficulties

• Hydrocephalus (fluid buildup in the brain)

Spinal Ependymoma Symptoms

• Back or neck pain

• Weakness in arms or legs

• Numbness or tingling

• Difficulty walking

• Loss of bladder or bowel control

Symptoms in Children

• Enlarged head circumference (infants)

• Developmental delays

• Irritability and lethargy

• Poor feeding

~How Ependymoma Is Diagnosed

Early and accurate diagnosis is crucial for effective treatment.

1. Neurological Examination

Doctors assess reflexes, coordination, strength, and sensory function.

2. Imaging Studies

• MRI (Magnetic Resonance Imaging) is the gold standard

• CT scans may be used initially in emergencies

3. Biopsy and Histopathology

• Surgical tissue sampling confirms diagnosis

• Determines tumor grade and subtype

4. Molecular and Genetic Testing

• Identifies specific genetic alterations

• Helps guide targeted treatment strategies

~Treatment Options for Ependymoma

Treatment depends on tumor type, grade, location, and patient age.

1. Surgery

Surgical removal is the cornerstone of treatment.

• Goal: Gross total resection (GTR)

• Complete removal significantly improves survival

• Advanced neurosurgical techniques improve outcomes

2. Radiation Therapy

Often recommended after surgery, especially when:

• Tumor removal is incomplete

• Tumor is high-grade

Types include:

• External beam radiation

• Proton beam therapy (especially in children)

3. Chemotherapy

• Limited effectiveness in most cases

• Used mainly in:

  • Infants to delay radiation

  • Recurrent or aggressive tumors

• Common drugs include platinum-based agents

4. Emerging and Targeted Therapies

• Molecularly targeted treatments

• Immunotherapy trials

• Precision medicine approaches

~Ependymoma in Children vs Adults

Pediatric Ependymoma

• Often located in the posterior fossa

• More aggressive molecular subtypes

• Long-term treatment side effects are a concern

Adult Ependymoma

• Commonly spinal

• Slower progression

• Better overall prognosis

~Prognosis and Survival Rates

Prognosis varies widely based on several factors.

Key Prognostic Factors

• Extent of tumor removal

• Tumor grade

• Molecular subtype

• Patient age

• Tumor location

5-Year Survival Rates (Approximate)

• Low-grade ependymoma: 70–90%

• High-grade ependymoma: 40–60%

• Pediatric posterior fossa PFA: lower survival than PFB subtype

Early diagnosis and complete surgical removal greatly improve outcomes.

~Recurrence and Long-Term Monitoring

Ependymomas have a high recurrence risk, even years after treatment.

Follow-Up Care

• Regular MRI scans

• Neurological assessments

• Endocrine and cognitive evaluations (children)

Long-term surveillance is essential for early detection of recurrence.

~Living With Ependymoma

Living with ependymoma can be physically and emotionally challenging.

Supportive Care Includes

• Physical and occupational therapy

• Neurocognitive rehabilitation

• Psychological counseling

• Pain management

Quality of Life Considerations

• Managing treatment side effects

• School and work accommodations

• Emotional and social support

~Prevention and Early Detection

Currently, there is no known way to prevent ependymoma. However:

• Early evaluation of persistent neurological symptoms

• Regular monitoring for high-risk individuals (e.g., NF2 patients)

~Frequently Asked Questions (FAQs)

Is ependymoma cancerous?

Yes, ependymoma is considered a cancerous tumor, though some forms are slow-growing and less aggressive.

Can ependymoma be cured?

Complete surgical removal followed by radiation can lead to long-term remission, especially in low-grade cases.

Does ependymoma spread?

It rarely spreads outside the CNS but can disseminate through cerebrospinal fluid.

Is ependymoma hereditary?

Most cases are not inherited, though rare genetic conditions may increase risk.

~Conclusion

Ependymoma is a rare but serious central nervous system tumor that affects both children and adults. Advances in neurosurgery, radiation therapy, and molecular diagnostics have significantly improved outcomes in recent years. However, recurrence remains a challenge, making long-term follow-up essential.

Early diagnosis, expert surgical care, and personalized treatment strategies offer the best chance for improved survival and quality of life. Ongoing research continues to uncover new therapies that may further enhance outcomes for patients with ependymoma.