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  • Title: Lateral Transorbital Approach for Repair of Lateral Sphenoid Sinus Meningoencephaloceles in Proximity to Foramen Rotundum: Cadaveric Study and Case Report.
    Author: Mathios D, Bobeff EJ, Longo D, Tabaee A, Anand VK, Godfrey KJ, Schwartz TH.
    Journal: Oper Neurosurg (Hagerstown); 2023 Aug 01; 25(2):168-175. PubMed ID: 37163719.
    Abstract:
    BACKGROUND: The repair of lateral sphenoid sinus cerebrospinal fluid leaks is routinely accomplished through the use of the endonasal endoscopic approach (EEA) with a transpterygoidal extension. This approach can incur sinus morbidity, damage to the vidian, palatine and trigeminal nerves, and the contents of the pterygopalatine fossa, particularly if the encephalocele is lateral to the foramen rotundum (FR) and V2. OBJECTIVE: To investigate the use of the lateral transorbital approach (LTOA) as an alternative approach for repair of lateral sphenoid sinus encephaloceles that avoids the potential morbidity of EEA. METHODS: We performed cadaveric dissections of 2 specimens (4 sides) and present one of the first cases of a lateral sphenoid sinus encephalocele repair lateral to the FR in a patient through an ipsilateral LTOA. RESULTS: We find that the LTOA provides a shorter distance to target compared with the EEA (56 vs 89.5 mm, P = .002). The LTOA field of view also affords excellent visualization of both the medial and lateral aspects of V2, whereas the EEA is less effective at exposing lateral to V2, even after sacrifice of the vidian nerve and maximal pterygopalatine fossa content retraction. We report a case of LTOA to repair a meningoencephalocele lateral to V2 in the sphenoid sinus. CONCLUSION: The LTOA to the foramen rotundum is a more direct approach that minimizes the morbidity associated with EEA to repair meningoencephaloceles both medial and lateral to foramen rotundum.
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