변형 경관골접근법을 통한 두개외 삼차신경초종 절제술

Extracranial Trigeminal Schwannoma Removal via Modified Transzygomatic Approach

Introduction : Surgical removal of extracranial trigeminal schwannoma has been challenging due to anatomic complexity and rarity of the disease. Transzygomatic approach can be a good option for extracranial trigeminal schwannoma, especially in cases extended to infratemporal fossa, pterygopalatine fossa and parapharyngeal space. Authors report several cases of extracranial trigeminal nerve schwannomas which were treated using modified or combined transzygomatic approaches. Materials and Methods : 3 patients were diagnosed as extracranial trigeminal schwannoma and underwent surgical removal via modified or combined transzygomatic approach from January 2013 to June 2016. Results : We analyzed the tumor control, complication rate, and origin of tumor. Among 3 patients, combined transzygomatic approach was applied to one patient. It was combined with transcervical approach for the patient. The huge extracranial trigeminal schwannomas were completely excised in all 3 cases. There were no significant complications. Conclusion : The modified transzygomatic approach is safe and useful for removal of huge extracranial trigeminal schwannoma without facial scar and is easily combined with transcervical approach.