(0932) Exclusive Transcanal Endoscopic Surgery for Tympanic Paragangliomas Filling the Middle Ear Cavity: A Case Series

Introduction: The objective of this case series is to describe feasibility and to illustrate the critical surgical points of an exclusive endoscopic transcanal approach (EETA) resection for paraganglioma extending from the hypotympanum to the epitympanum while preserving the integrity of the ossicular chain.

Methods: Retrospective chart review of EETA and outcomes for middle ear paragangliomas (MEPG), stage A2 or B1 of the modified Fisch Mattox classification between 2018 and 2022.

Results: In total, 4 female and 2 male patients with an average age of 58.3 years, from 41 to 83 years underwent MEPG removal through EETA between 2018 and 2022. There were 3 stage A2 and 3 stage B1 paragangliomas according to the modified Fisch-Mattox classification. We reported no conversion to microscopic or retroaural approach. At present, there was no postoperative complications nor tumor recurrence, with an average follow-up of 38.7 months from 14 to 61 months.

Conclusions: MEPG resection through EETA is feasible and can be considered as an less invasive, scarless and mastoid conservative surgical technique allowing resection for paraganglioma extending from the hypotympanum to the epitympanum while preserving the ossicular chain.