Skull Base Surgery
Skull base surgery is a specialized field of neurosurgery and otolaryngology focused on treating complex tumors, vascular malformations, and structural lesions located at the delicate undersurface of the brain (the skull base), where major blood vessels and cranial nerves enter and exit the cranium.
Core Operational Approaches
Endoscopic Endonasal Approach (EEA): A minimally invasive technique where neurosurgeons and ENT surgeons navigate through the natural nasal passages using high-definition endoscopes to reach pituitary, clival, and anterior skull base lesions without external facial or cranial incisions.
Transcranial Skull Base Approaches: Advanced open surgical techniques tailored to access deep, lateral, or complex lesions via precise bone removal:
Transbasal / Anterior Craniofacial: Accesses lesions in the anterior cranial fossa and paranasal sinuses.
Pterional / Orbitozygomatic: Modifies the standard craniotomy by removing orbital and zygomatic bone bars to minimize brain retraction when treating parasellar and anterior circulation vascular lesions.
Translabyrinthine / Retrosigmoid: Posterior fossa corridors used to reach acoustic neuromas (vestibular schwannomas) and cerebellopontine angle lesions.
Stereotactic Radiosurgery (SRS): Non-invasive, highly focused radiation beams (e.g., Gamma Knife) used either as a primary treatment for small skull base tumors or as an adjuvant therapy following subtotal surgical resection.
Common Conditions Treated in Skull Base Surgery
| Category | Typical Conditions | Primary Treatment Objective |
| Pituitary & Parasellar | Pituitary adenomas, Craniopharyngiomas, Rathke cleft cysts | Total endoscopic resection, preservation of vision and pituitary hormonal function |
| Acoustic & Cranial Nerves | Acoustic neuromas (vestibular schwannomas), Trigeminal schwannomas | Tumor resection or radiosurgery while attempting facial nerve and hearing preservation |
| Meningeal & Bone Lesions | Meningiomas of the sphenoid wing/clivus, Chordomas, Chondrosarcomas | Maximal safe surgical debulking and reconstruction of bony defects |
| Vascular & Neural Decompression | Trigeminal neuralgia, Hemifacial spasm, Complex skull base aneurysms | Microvascular decompression (MVD) or surgical clip reconstruction |
Skull Base Surgical Workflow
Pre-Operative Planning & Multidisciplinary Evaluation
High-resolution contrast MRI, fine-cut CT bone-window imaging, and angiographic mapping evaluated by neurosurgery, ENT, and neuro-ophthalmology teams
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Intraoperative Guidance & Surgical Access
Real-time 3D neuronavigation and continuous cranial nerve monitoring (e.g., CN II, V, VII, X) integrated for precise corridor entry
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Lesion Resection & Micro-Dissection
Endoscopic or microsurgical resection while meticulously preserving surrounding carotid arteries, optic nerves, and brainstem tissue
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Multilayered Skull Base Reconstruction
Watertight repair of dural defects using vascularized mucosal flaps (e.g., nasoseptal flap), fascia lata, or abdominal fat grafts to prevent CSF leaks