Abstract
Intralabyrinthine schwannoma (ILS) is a rare benign tumor of the inner ear potentially causing unilateral sensorineural hearing loss and vertigo. This study evaluated the outcome of one surgical session comprising microsurgical ILS resection and cochlear implantation in terms of surgical feasibility, complications, and auditory outcome. Ten clinically and histologically confirmed ILS patients included in this study (three women and seven men; mean age 56.4 ± 8.6) underwent surgery between July 2015 and February 2020. Eight patients had intracochlear tumor location; the remaining two had vestibulocochlear and intravestibular ILS. One of the three following methods was used for tumor removal: an extended cochleostomy, subtotal cochleoectomy, or a translabyrinthine approach. Although negligible improvement was observed in two of the patients, two patients were lost to follow-up, and one opted out from using CI, the speech perception of the five remaining ILS patients improved as per the Freiburg Monosyllable Test (FMT) from 0% before surgery to 45– 50% after the implantation. Our study supports the presented surgical approach’s feasibility and safety, enabling tumor removal and hearing restoration shortly after surgery.
Highlights
Schwann cells are the main glia of the peripheral nervous system, structurally and physiologically supporting the neurons [1]
The present study evaluated the feasibility of performing Intralabyrinthine schwannoma (ILS) tumor resection and cochlear implantation during the same surgical session
Six patients were diagnosed with asymmetric hearing loss (AHL), and four with single-sided deafness (SSD)
Summary
Schwann cells are the main glia of the peripheral nervous system, structurally and physiologically supporting the neurons [1]. The Schwann cells give rise to neurofibromas and schwannomas. Schwannomas are grade I benign neoplasms representing the most common, non-malignant nerve sheath tumor [2]. A typical example of a schwannoma is a vestibular schwannoma (VS, a.k.a. acoustic neuroma), which develops on the 8th cranial nerve. The symptoms associated with VS include hearing loss, vertigo, and tinnitus. The hearing loss induced by sporadic VS is unilateral and can be gradually progressive or sudden. Regarding the latter, VS accounts for approximately
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