What is a Clival Chordoma?
A chordoma is a rare type of bone cancer that occurs in the spine or base of the skull. Clival chordomas specifically develop in the clivus, a bone at the base of the skull that sits behind the sphenoid sinus and in front of the brainstem. These tumors arise from remnants of the notochord, a structure present during fetal development.
Key Characteristics
- Rarity: Chordomas account for approximately 1-4% of all malignant bone tumors and about 0.2% of all primary central nervous system tumors
- Age: Can occur at any age, but most commonly diagnosed between ages 40-60
- Growth: Slow-growing but locally aggressive tumors
- Location: About one-third occur at the skull base (clival region)
Common Symptoms
- Headaches, often chronic and progressive
- Double vision or vision problems (diplopia)
- Facial numbness or pain
- Difficulty swallowing (dysphagia)
- Hearing loss or tinnitus
- Neck pain or stiffness
- Balance problems
Treatment Options
Surgery
Surgical removal is the primary treatment for clival chordomas. Given the location near critical structures (brainstem, cranial nerves, major blood vessels), surgery is complex and requires specialized neurosurgical teams. Common surgical approaches include:
- Endoscopic Endonasal Approach: Minimally invasive surgery through the nose
- Transoral Approach: Through the mouth
- Transcranial Approaches: Through the skull (subfrontal, temporal, etc.)
- Combined Approaches: Multiple routes for extensive tumors
Radiation Therapy
Since complete surgical removal is often difficult due to tumor location, radiation therapy is commonly used:
- Proton Beam Therapy: Preferred for chordomas due to precise dose delivery and ability to spare surrounding tissue
- Intensity-Modulated Radiation Therapy (IMRT): Advanced form of radiation that conforms to tumor shape
- Stereotactic Radiosurgery: Precise, high-dose radiation for small residual tumors
Targeted Therapy & Clinical Trials
Research into targeted therapies is ongoing. Some areas of investigation include:
- PDGFR (Platelet-Derived Growth Factor Receptor) inhibitors
- EGFR (Epidermal Growth Factor Receptor) inhibitors
- Clinical trials for new treatments
Prognosis & Follow-Up
Prognosis for clival chordomas varies based on several factors:
- Extent of surgical resection (complete vs. partial)
- Tumor size and invasion into surrounding structures
- Use and timing of radiation therapy
- Patient age and overall health
Recurrence Risk
Chordomas have a significant risk of recurrence, which is why long-term follow-up with regular MRI imaging is essential. The risk of recurrence is lower with complete surgical resection followed by radiation.
Follow-Up Schedule
Typical follow-up includes:
- MRI imaging every 6 months for the first 2-3 years
- Annual MRI imaging thereafter
- Regular neurological examinations
- Coordination with multidisciplinary team
Prognosis & Follow-Up
Prognosis for clival chordomas varies based on several factors:
- Extent of surgical resection (complete vs. partial)
- Tumor size and invasion into surrounding structures
- Use and timing of radiation therapy
- Patient age and overall health
Recurrence Risk
Chordomas have a significant risk of recurrence, which is why long-term follow-up with regular MRI imaging is essential. The risk of recurrence is lower with complete surgical resection followed by radiation.
Follow-Up Schedule
Typical follow-up includes:
- MRI imaging every 6 months for the first 2-3 years
- Annual MRI imaging thereafter
- Regular neurological examinations
- Coordination with multidisciplinary team
Resources & References
Organizations
- Chordoma Foundation: www.chordoma.org - Dedicated to chordoma research and patient support
- National Cancer Institute: www.cancer.gov - General information on rare cancers
- National Organization for Rare Disorders (NORD): rarediseases.org
Research Articles & Clinical Trials
- ClinicalTrials.gov - Search for "chordoma" to find active studies
- PubMed - Search for recent publications on clival chordoma treatment
My Research Notes
[This section is for your personal research findings, questions for doctors, and notes from consultations]
Research Notes Template
Date: ___________
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