Skull Base Surgery
Skull base surgery encompasses a range of advanced neurosurgical techniques used to treat tumours, vascular lesions, and congenital abnormalities located at the base of the skull — the complex bony platform separating the brain from the facial structures, sinuses, and neck. These procedures require specialised approaches to access deep-seated lesions while preserving critical structures including cranial nerves, major blood vessels, and the brainstem.
When this procedure may be recommended
- Skull base tumours: meningiomas, acoustic neuromas (vestibular schwannomas), chordomas, chondrosarcomas, esthesioneuroblastomas.
- Pituitary tumours extending beyond the sella turcica.
- Skull base malignancies invading from the sinuses, orbits, or temporal bone.
- Vascular lesions: aneurysms, arteriovenous malformations, or fistulae at the skull base.
- Cerebrospinal fluid leaks originating from skull base defects.
- Congenital abnormalities such as encephaloceles.
Who may be a candidate
Candidates are patients with confirmed skull base pathology requiring surgical intervention. The choice of approach depends on tumour location, size, relationship to critical structures, and the patient's overall fitness. Many cases benefit from a multidisciplinary team approach with ENT surgeons.
Advanced medical implant technology (no text). Alternatives to surgery
- Stereotactic radiosurgery (Gamma Knife) for small, residual, or recurrent skull base tumours.
- Conventional fractionated radiotherapy.
- Observation with serial imaging for small, incidental, asymptomatic lesions.
- Endovascular embolisation for vascular skull base lesions.
What to expect
- Approach Selection: The specific surgical approach is tailored to the tumour location: pterional, subtemporal, retrosigmoid, translabyrinthine, extended transsphenoidal, or combined craniofacial.
- Craniotomy: A precisely planned bone opening is made to provide the optimal surgical corridor to the skull base lesion.
- Microsurgical Dissection: Using the operating microscope, the surgeon carefully separates the tumour from cranial nerves, blood vessels, and brainstem.
- Tumour Removal: The lesion is debulked internally and then dissected from surrounding structures, aiming for maximal safe resection.
- Skull Base Reconstruction: The skull base defect is reconstructed using vascularised tissue flaps, fascia grafts, or titanium mesh to prevent cerebrospinal fluid leakage.
- Closure: The bone flap is replaced, and the wound is closed in layers.
Technology and imaging
Combines microsurgical and endoscopic techniques, intraoperative neuronavigation, cranial nerve monitoring (facial, auditory, lower cranial nerves), and advanced skull base reconstruction materials.
High-precision diagnostic imaging visualization. 
Clinical Zeiss/Leica operating microscope setup. Hospital stay
Typically 5 to 10 nights depending on the complexity of the approach and the need for ICU monitoring.
Recovery milestones
- Days 1-3: ICU monitoring with close cranial nerve assessment, blood pressure management, and pain control.
- Days 4-10: Ward mobilisation, swallowing and speech assessments, wound care, and rehabilitation planning.
- Weeks 1-6: Home recovery. Activity restrictions, wound care, and monitoring for CSF leak signs.
- Months 3-6: Follow-up MRI and clinical assessment. Adjuvant radiotherapy if indicated.
Post-operative mobilization and recovery milestones. Risks and complications
- Cranial nerve injury causing facial weakness, hearing loss, swallowing difficulty, or eye movement problems.
- Cerebrospinal fluid leak requiring surgical repair (5% to 10%).
- Meningitis or wound infection.
- Stroke, vascular injury, or brainstem injury.
- Incomplete tumour removal necessitating adjuvant radiotherapy.
Frequently asked questions
What makes skull base surgery different from other brain surgery?
Skull base surgery is technically demanding because the surgical target is deep, surrounded by critical cranial nerves and major blood vessels, and requires specialised bony approaches. It often involves collaboration between neurosurgeons and ENT surgeons, and requires advanced intraoperative monitoring to protect nerve function.
Can all skull base tumours be completely removed?
The goal is always maximal safe resection. Many benign skull base tumours can be completely removed. However, when a tumour is adherent to critical structures such as the brainstem or carotid artery, a deliberate subtotal resection followed by radiosurgery may be the safest strategy to preserve neurological function.