J Neurol Surg Rep 2016; 77(01): e56-e61
DOI: 10.1055/s-0035-1570389
Case Report
Georg Thieme Verlag KG Stuttgart · New York

Denervation of the Eustachian Tube and Hearing Loss Following Trigeminal Schwannoma Resection

Christopher J. Ito
1  Department of Otolaryngology–Head and Neck Surgery, University of South Florida, Tampa, Florida, United States
,
Alexander K. Malone
1  Department of Otolaryngology–Head and Neck Surgery, University of South Florida, Tampa, Florida, United States
,
Ricky H. Wong
2  Skull Base and Pituitary Surgery, NorthShore University Health System, Evanston, Illinois, United States
,
Harry R. van Loveren
3  Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, Florida, United States
,
K. Paul Boyev
1  Department of Otolaryngology–Head and Neck Surgery, University of South Florida, Tampa, Florida, United States
› Author Affiliations
Further Information

Publication History

18 October 2015

17 November 2015

Publication Date:
01 March 2016 (online)

  

Abstract

Objectives To discuss eustachian tube dysfunction (ETD) as a cause of hearing loss and to discuss its pathogenesis following resection of trigeminal schwannomas.

Methods Presented herein are two cases of trigeminal schwannoma that were resected surgically with sacrifice of the motor branch of the trigeminal nerve. Neither of the cases had evidence of extracranial extension nor preoperative ETD. Both patients developed ETD and have been followed without evidence of schwannoma recurrence.

Conclusions Trigeminal schwannomas are rare tumors that typically require surgical resection. Hearing loss is a potential postsurgical deficit and warrants evaluation by an otolaryngologist with consideration given to a preoperative audiogram. ETD as a result of trigeminal motor branch sacrifice should be included in the differential diagnosis of postoperative hearing loss in this patient subset as it may be reversed with placement of a tympanostomy tube.

Presented at North American Skull Base Society Meeting in Tampa, FL February 20-22, 2015.