The petrosal approach with hearing preservation

Area of Science:

• Neurosurgery
• Skull Base Surgery
• Cerebrovascular Surgery

Background:

• Petroclival lesions present significant surgical challenges due to their deep location.
• Traditional approaches may involve substantial retraction or sacrifice of neurovascular structures.
• Preservation of neurological function, particularly hearing, is a critical consideration.

Purpose of the Study:

• To evaluate the efficacy and safety of a modified petrosal approach for petroclival lesions.
• To assess the technique's ability to preserve hearing and minimize neurological deficits.
• To determine the suitability of the approach for various neoplastic and vascular pathologies.

Main Methods:

• Retrospective analysis of 26 patients undergoing a hearing-preserving petrosal approach.
• Surgical pathology included meningiomas, chordomas, epidermoid cysts, aneurysms, and cavernous malformations.
• Detailed assessment of surgical outcomes, complications, and neuro-otological results.

Main Results:

• Complete tumor resection achieved in 14 of 20 tumors; all 6 vascular lesions were definitively treated.
• Low complication rates, including transient cranial nerve palsies and occasional cerebrospinal fluid leakage.
• High-frequency sensorineural hearing loss occurred in three patients; inner ear structures were preserved.
• The approach provided wide exposure with minimal cerebellar and temporal lobe retraction.

Conclusions:

• The modified petrosal approach is effective for treating a range of petroclival lesions.
• It offers excellent exposure while preserving hearing and minimizing neurological injury.
• This technique is a valuable option for complex skull base pathologies involving the petroclival region.