Ja‐Won Koo

The ototoxic aminoglycoside antibiotics are essential to treat severe bacterial infections, particularly in neonatal intensive care units. Using a bacterial lipopolysaccharide (LPS) experimental model of sepsis, we tested whether LPS-mediated inflammation potentiates cochlear uptake of aminoglycosides and permanent hearing loss in mice. Using confocal microscopy and enzyme-linked immunosorbent assays, we found that low-dose LPS (endotoxemia) greatly increased cochlear concentrations of aminoglyc

Thinning or dehiscence of the superior semicircular canal may occur on the middle cranial fossa floor or adjacent to the superior petrosal sinus (SPS). However, no symptomatic cases of superior canal dehiscence by SPS have been previously described. A 45-year-old woman presented with left-side pulsating tinnitus, autophony and disequilibrium. Examination showed conductive hearing loss and decreased threshold of vestibular evoked myogenic potential in the left side. Sound and vibration stimuli an

Our results demonstrate that patients may develop vestibular symptoms during their clinical course, and all patients with an enlarged vestibular aqueduct should be cautioned regarding the potential development of vestibular pathology. Moreover, the non-negligible incidence of secondary BPPV mandates positional tests when evaluating EVA patients with vertigo.

To investigate HLA-associated genetic susceptibility to Meniere's disease in relation to type II collagen (CII) autoimmunity status, HLA-DRB1 genotyping and ELISA measurement of anti-CII antibody were performed in 41 Korean patients with Meniere's disease. In the anti-CII positive subgroup (20%) of patients, the frequency of HLA-DRB1*0405 was significantly increased (uncorrected) compared with both controls (63% vs 16%) and anti-CII negative patients (63% vs 12%). In the anti-CII negative subgro

<b>Objectives:</b> The aim of this study was to delineate the clinical and laboratory features suggestive of intralabyrinthine schwannoma (ILS). <b>Methods:</b> We compared the clinical features of 16 patients with ILS, who had been diagnosed at the Seoul National University Bundang Hospital from 2003 to 2018, with those of 18 patients with symptomatic unilateral intracanalicular schwannoma and randomly selected 20 patients with definite or probable unilateral Meniere's disease (MD). <b>Results:

Comorbid BPPV is a negative prognostic indicator of auditory function in ISSNHL. Concurrent BPPV in ISSNHL suggests combined damage to the utricle and may indicate severe and widespread labyrinthine damage, leading to the poor prognosis.

*Departments of Otorhinolaryngology–Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam; and †Sensory Organ Research Institute, Seoul National University Medical Research Center, Seoul, South Korea Address correspondence and reprint requests to Chong Sun Kim, M.D., Ph.D., Department of Otorhinolaryngology–Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea; E-mail: [email protected] The authors disclose no conflicts of interest.

Among 26 patients with radiologically confirmed EVA, 5 (19.2%) exhibited positional nystagmus compatible with BPPV through Dix-Hallpike and head-roll tests. Hearing loss usually accompanied BPPV attacks, and BPPV was recurrent in three patients. Multiple semicircular canals were frequently involved in each episode, and different canals were also involved in recurrent cases. Canalith repositioning procedures were usually successful without difficulty.

Background and Objectives laser is known to have optimal tissue characteristics for stapes surgery though it has suboptimal optical characteristics. Surgical experience of stapes surgery using laser has not been previously reported in Korea. In this study, authors assessed the functional outcomes of stapes surgery using laser and evaluated its merits and drawbacks. Subjects and Method We retrospectively reviewed the medical records of 25 patients (28 ears) who underwent laser stapedotomy between

37 patients (71%) showed VIN. VIN to ipsilesional side was in 10 and to contralesional side in 27. In patients with CP over 43% (N =23), 2 beated to ipsilesional side, 17 to contralesional side and 4 showed no VIN. In patients with CP of less than 43% (N =29), 8 beated to ipsilesional side, 10 to contralesional side and 11 showed no VIN (p<0.05). 33 patients (63%) showed HSN and 24 patients of them (72%) showed contralesional nystagmus. The intensity of VIN shows significant positive correlation

Transtympanic resurfacing with bone cement, reinforcing the dehiscent JB to reduce focal turbulent flow, is a simple and effective surgical treatment option in patients with PT due to HJBD. In patients with HJBD, the objective measurement of PT by TSR/STA may be of help in selecting appropriate surgical candidates and objective evaluation of the treatment outcome.

The lateralization value of VIN was comparable with caloric test and superior to HSN. VIN is a useful vestibular test detecting vestibular asymmetry in the evaluation of dizziness.

Inflammatory mediators released during bacterial infection include vasoactive peptides such as histamine and serotonin, and their serum levels are frequently elevated. These peptides also modulate the vascular permeability of endothelial cells lining the blood-brain and blood-labyrinth barriers (BLB). These peptides may also modulate the permeability of the BLB to ototoxic aminoglycoside antibiotics prescribed to resolve bacterial sepsis. To test this hypothesis, we compared the effect of histam