Audiovestibular involvement in systemic sclerosis

Hearing impairment in systemic sclerosis patients-what do we really know?

Background

Systemic sclerosis (SSc) is a disease of a very heterogeneous clinical picture and immunological profile with progression rate that varies between individuals. Although hearing deterioration is not a complaint that comes to the fore in SSc patients, as it is not life-threatening compared to many other more severe symptoms of this disease, it can significantly impair the quality of life. Medical literature concerning this problem is rather scarce.

Materials and methods

In this article we systematically reviewed the medical publications concerning hearing impairment in patients with systemic sclerosis to evaluate current understanding of this complex problem. Following PRISMA guidelines a total of 19 papers were found and analysed including 11 original studies and 8 case reports.

Results

Although it seems that hearing impairment in SSc patients is relatively more common than in the general population, based on the analysis of available literature, no firm conclusions regarding its frequency and pathomechanism can be drawn yet. Microangiopathy leading to damage to the sensory cells of the inner ear is suspected to be the main mechanism of hearing loss, although damage to the higher levels of the auditory pathway appears to be underestimated due to incomplete audiological diagnosis.

Conclusion

Undoubtedly, the reason for the difficulty in such an evaluation are the complex and still not fully elucidated pathomechanism of SSc, the individually variable dynamics of the disease and the unique heterogeneity of symptoms. Nevertheless, further studies in larger and appropriately selected groups of patients, focused more on the dynamics of microangiopathy and not solely on clinical symptoms could provide answers to many key questions in this regard.

Human otopathology in scleroderma

Objective

Scleroderma is a complex chronic progressive immune-mediated disease that causes fibrosis of the skin and internal organs, and vasculopathy.Ear involvement has been poorly studied in patients with scleroderma. Vasculitic and autoimmune mechanisms are considered as possible etiologies on hearing impairment, however, this etiology still unclear.Herein, we reviewed three cases of scleroderma from a temporal bone repository.

Methods

The national temporal bone database was reviewed for cases with scleroderma. Clinical case review and correlative otopathologic analysis. Middle and inner ear otopathologic analysis was performed following hematoxylin and eosin staining under light microscopy. Findings were compared to three age-matched controls.

Results

Two patients (three cases) with a history of serologically confirmed scleroderma were identified. Both individuals reported tinnitus and demonstrated bilateral moderate to severe down-sloping sensorineural hearing loss on audiometry. Histologically, the incudomallear joint space was diminished and ossicles appeared demineralized. A loss of hyaline cartilage, and obliteration of the incudomallear and incudostapedial joint synovial spaces was observed. Decreased caliber and intimal hyperplasia of arteries adjacent to ossicles was also identified. Mild diffuse atrophy of stria vascularis in the middle and apical turns of cochlea were found. Hair cell populations were normal. Total spiral ganglion neurons were lower in cases of scleroderma (range 29%-51%) compared to age-matched controls.

Conclusion

Fibrosis, inflammation, and vascular changes were observed in the middle and inner ear in patients with scleroderma. Findings have implications for understanding hearing and vestibular dysfunction in this patient population.

Level of evidence

Retrospective study.

Secondary autoimmune immune ear disease (AIED): a systematic review and meta-analysis on vestibular manifestations of systemic autoimmune and inflammatory disorders

Secondary autoimmune inner ear disease (AIED) is often bilateral and asymmetric in patients presenting with audiovestibular symptoms due to a systemic autoimmune disease. This systematic review and meta-analysis are aimed at identifying and highlighting patterns in prevalence of vestibular dysfunction, symptom presentation, and diagnostic methods in extant literature by combining clinical context from case reports with quantitative analyses from cohort studies. Screening of articles by title, abstract, and full text was completed by four reviewers (K.Z., A.L., S.C., and S.J.). In this study, we grouped secondary AIED and systemic autoimmune diseases by pathophysiologic mechanism: (1) connective tissue disease (CTD), (2) vasculitides (VAS), (3) systemic inflammatory disorders (SID), and (4) other immune-mediated disorders (OIMD). The search for AIED disease identified 120 articles (cohorts and case reports) that met the final inclusion criteria. All 120 were included in the qualitative review, and 54 articles were included for meta-analysis. Of these 54 articles, 22 included a control group (CwC). Ninety individual cases or patient presentations from 66 articles were included for analysis in addition to the 54 cohort articles. Secondary AIED does not have a diagnostic algorithm for managing vestibular symptoms. The management of audiovestibular symptoms requires close collaboration between otolaryngologists and rheumatologists to preserve end-organ function of the ear. To improve our ability to understand the impact on the vestibular system, vestibular clinicians need to develop a standardized reporting method. Clinical presentation should frequently be paired with vestibular testing to contextually investigate symptom severity and provide higher quality care.

Audiovestibular Manifestations in Patients with Primary Raynaud's Phenomenon and Raynaud's Phenomenon Secondary to Systemic Sclerosis

OBJECTIVES

To address the prevalence of audiovestibular disorders in patients with primary Raynaud's Phenomenon (RP). A series of patients with primary RP and secondary RP in the context of systemic sclerosis (SSc) were compared with healthy controls.

METHODS

A prospective multicenter observational cross-sectional study was conducted in several Otolaryngology and Rheumatology Divisions of tertiary referral hospitals, recruiting 57 patients with RP and 57 age- and gender-matched controls. Twenty patients were classified as primary RP when unrelated to any other conditions and 37 patients who met the 2013 ACR/EULAR classification criteria for SSc were classified as having secondary RP associated with SSc. Audiometric and vestibular testing (vHIT), clinical sensory integration and balance testing (CTSIB), and Computerized Dynamic Posturography (CDP) were performed.

RESULTS

As significant differences were found in the age of the two study groups, primary and secondary RP, no comparisons were made between both groups of RP but only with their control groups. No sensorineural hearing loss (SNHL) was recorded in any of our patients with primary RP and no differences were found in the voice audiometry tests with respect to controls. Four of 37 (10.8%) secondary RP patients presented SNHL. Those with SNHL were 7.03 times more likely to have a secondary RP than controls (p < 0.001). The audiometric curve revealed high-frequency hearing loss in 4 patients with RP secondary to SSc, and statistically significant differences were achieved when RP secondary was compared to controls in vHIT gain, caloric test, CTSIB, and CDP.

CONCLUSIONS

Unlike patients with RP secondary to SSc, patients with primary RP do not show audiovestibular abnormalities. Regarding audiovestibular manifestations, primary RP can be considered a different condition than secondary RP.

Hearing Loss Secondary to Systemic Sclerosis Vasculopathy: Case Study with a Short Review

Systemic sclerosis (SSc) is a collagenosis with a substrate of chronic inflammation, which is determined by autoimmunity. The pathogenesis of this disease involves microvasculopathy (small vessel pathology) followed by excessive cutaneous and visceral fibrosis. Although acoustic and vestibular impairment is not classified as being a secondary pathology of SSc, several studies have identified cases of SSc that associate hearing loss and especially vertigo and tinnitus. This paper presents data from the medical literature that have identified vestibular and auditory symptoms among patients with SSc, associating the clinical case presentation of a patient suffering from SSc, which is associated with hearing loss. The need for additional studies on larger groups of patients is underlined, in order to clarify the impact of vasculopathy and fibrosis on the acoustic and vestibular analyzer in patients with SSc.

Sensorineural Hearing Loss and Systemic Autoimmune Disease: The Experience of a Systemic Immune-Mediated Diseases Unit

Background

Autoimmune inner ear disease (AIED) represents less than 1% of all cases of sensorineural hearing loss (SNHL) but its frequency may be underestimated due to lack of specific clinical and laboratory criteria. AIED can be associated with a systemic autoimmune disease (SAID) in 15%-30% of the cases. The objective of the present study was to characterize the clinical and prognostic factors of a cohort of patients with AIED.

Materials and methods

The authors conducted a retrospective descriptive analysis of a cohort of patients with AIED referred from the otorhinolaryngology department to a systemic immune-mediated diseases unit between March 2013 and November 2020. A consecutive sample of 39 patients with suspected AIED was referred. SNHL was defined as a fall of the hearing threshold of at least 30 decibels in three consecutive frequencies. Eight patients were excluded for not meeting the audiometric criteria or having confounding factors. The remaining 31 patients were included with a total of 50 affected ears. To classify the intensity of hearing loss, an arithmetic mean of pure tone was calculated. Normal hearing or mild hearing loss at the last pure tone audiometry of the follow-up were an indicator of good prognosis and were considered the outcome of interest.

Results

Thirty-two percent of the patients had an associated SAID. There were no differences regarding demographic and clinical characteristics when comparing patients with AIED alone and patients with AIED and a SAID, except for the positivity of antinuclear antibodies (ANA). ANA positivity was superior in patients with the association of AIED and a SAID when compared with patients with AIED alone (90% vs 50%; p=0.037). The SAID was diagnosed after the AIED in 70% of the patients, in which diagnosis of the SAID occurred a median of 4,2 (IQR 0.8-5.1) years after the diagnosis of the AIED. Normal audiometric evaluation or a mild hearing loss was achieved in 31% of the ears at the last audiometric evaluation. A normal audiometry or a mild hearing loss at the time of diagnosis was independently associated with a better outcome (31%, 14%, CI 1.71-273.69; p=0.018). Bilateral hearing loss was independently associated with a worse outcome (54%, 79%, CI 0.01-0.84; p=0.035). The use of systemic corticosteroids (p=0.941), transtympanic corticosteroids (p=0.700) and non-steroid immunomodulator drugs (p=0.986) did not affect prognosis. The presence of a SIAD did not affect the prognosis (p=0.986).

Conclusions

In this cohort, SAID was present in one-third of the patients with AIED. A good prognosis was achieved in one-third of the patients. A normal audiometry or mild disease at presentation was associated with a good outcome, whilst bilateral involvement was associated with a bad one. Association of a SAID did not seem to influence the hearing-related prognosis. Positivity of ANA antibodies may justify performing a complementary investigation to determine the presence of a SAID.

Alterações auditivas na esclerose sistêmica

RESUMO Objetivo Descrever as queixas e alterações auditivas em indivíduos com esclerose sistêmica (ES), bem como verificar a evolução do quadro audiológico. Método Trata-se de estudo seccional, com uma fase prospectiva, realizado no período de 2012 e 2015, com pacientes com diagnóstico médico de ES. Foram coletados dados sociodemográficos, ano de início da doença, ano de diagnóstico e subtipo da enfermidade. Posteriormente, foram realizadas a anamnese audiológica, para identificação de queixas e sintomas e para a investigação de realização de audiometria pregressa ao estudo, e, em seguida, a avaliação audiológica básica. Resultados Participaram do estudo 50 indivíduos. Tontura e zumbido foram os sintomas mais frequentes. A perda auditiva foi identificada em 23 (46%) indivíduos, sendo a maioria do tipo sensorioneural, de grau e configurações variáveis. A análise dos limares auditivos obtidos na avaliação audiológica realizada em 2012 e, posteriormente, em 2015 indicou desencadeamento ou progressão da perda auditiva, com piora de 10dB na maioria das frequências avaliadas, sendo mais expressiva nas frequências agudas. Conclusão Elevada frequência de queixas e alterações auditivas em indivíduos com ES e desencadeamento e/ou progressão da perda auditiva naqueles que realizaram avaliação audiológica sequencial.

Hearing loss in patients with scleroderma: associations with clinical manifestations and capillaroscopy

Systemic sclerosis is a multi-systemic disease with widespread small-vessel vasculopathy and fibrosis. Involvement of the middle and inner ear and hearing loss has been reported as an uncommon manifestation of scleroderma in some studies. In this study, we evaluated hearing problems in scleroderma patients and determined its association with clinical manifestations and capillaroscopy. We evaluated 54 patients with scleroderma referred to Hafez Hospital clinic of scleroderma related to Shiraz University of Medical Science; they fulfilled the LeRoy and ACR/EULAR criteria for scleroderma. Control group consisted of 60 normal individuals. All clinical manifestations, nail fold capillaroscopy, pure tone audiometry, speech reception threshold, and speech audiometry were recorded during evaluation. Subjective hearing loss and objective hearing loss were seen in 10 and 36 patients of the case group (18.5%, 66.7%) and 6 and 10 of the control group (10%, 28.3%) (P values 0.03, < 0.001). Sensorineural hearing loss, abnormal pure tone audiometry, and abnormal speech reception threshold were more common in scleroderma patients compared to the control group (P values of < 0.001, < 0.001, and < 0.001). There was no correlation between objective hearing loss and type of scleroderma, duration of disease, skin score, interstitial lung disease, digital ulcer, gastrointestinal involvement, or nail fold capillaroscopy patterns (all P values > 0.05). In our study, subjective and objective hearing loss were higher in patients with scleroderma compared to the control group and also sensorineural hearing loss, abnormal pure tone audiometry, and abnormal speech reception threshold. There was no correlation between objective hearing loss and clinical manifestations or capillaroscopy findings.

Hearing loss in autoimmune disorders: Prevalence and therapeutic options

The objective of this study was to review our current knowledge relative to the correlation between sensorineural hearing loss (SNHL) and autoimmune diseases, focusing on the prevalence of hearing loss in different pathologies and possible therapeutic approaches. A review of the literature on hearing loss in different forms of autoimmune disease has been carried out, with emphasis on incidence and prevalence of SNHL. Therapeutic protocols have been assessed including both conservative medical and rehabilitative methods. Cochlear implant outcomes have been investigated. The prevalence of hearing loss in autoimmune and immune-mediated inner ear diseases, as referred by case reports or single-center statistics, is widely variable. More difficult is the evaluation of severe/profound SNHL, usually reported in relation to cochlear implantation. Though these patients represent ideal candidates for cochlear implantation, as they become deaf after years of hearing; the associated systemic disease, the specific damage on inner ear structures and the medication taken may influence the result of cochlear implantation. The main problem is the cochlear fibrosis or ossification that has been found to affect 50% of implanted ears in patients suffering from autoimmune and immune-mediated SNHL. Hence, in the presence of severe/profound SNHL earlier implantation may be indicated before post-inflammatory obliterative changes to the cochlea.

Retrocochlear impairments in systemic sclerosis: a case report study

PURPOSE

To report three cases of patients with Systemic Sclerosis (SSc) and retrocochlear impairments.

METHODS

This is a case report of three individuals with SSc and retrocochlear impairments assisted at a rheumatology outpatient clinic. All individuals underwent Brainstem Auditory Evoked Potential (BAEP) and, when necessary, audiometry.

RESULTS

All three individuals presented sensorineural hearing loss. Although no retrocochlear impairment was identified in the basic audiologic evaluation, the BAEP results were altered.

CONCLUSION

Retrocochlear impairments were present in the individuals under study, both in the absolute latencies and interpeak interval, thereby demanding the attention of rheumatologists and speech-language pathologists to such changes during the monitoring of SSc patients. The results also show a need for epidemiological studies on the theme.

Auditory and vestibular dysfunctions in systemic sclerosis: literature review

Purpose:To describe the prevalence of auditory and vestibular dysfunction in individuals with systemic sclerosis (SS) and the hypotheses to explain these changes.Research strategy:We performed a systematic review without meta-analysis from PubMed, LILACS, Web of Science, SciELO and SCOPUS databases, using a combination of keywords "systemic sclerosis AND balance OR vestibular" and "systemic sclerosis AND hearing OR auditory."Selection criteria:We included articles published in Portuguese, Spanish, or English until December 2011 and reviews, letters, and editorials were excluded. We found 254 articles, out of which 10 were selected.Data analysis:The study design was described, and the characteristics and frequency of the auditory and vestibular dysfunctions in these individuals were listed. Afterwards, we investigated the hypothesis built by the authors to explain the auditory and vestibular dysfunctions in SS.Results:Hearing loss was the most common finding, with prevalence ranging from 20 to 77%, being bilateral sensorineural the most frequent type. It is hypothesized that the hearing impairment in SS is due to vascular changes in the cochlea. The prevalence of vestibular disorders ranged from 11 to 63%, and the most frequent findings were changes in caloric testing, positional nystagmus, impaired oculocephalic response, changes in clinical tests of sensory interaction, and benign paroxysmal positional vertigo.Conclusion:High prevalence of auditory and vestibular dysfunctions in patients with SS was observed. Conducting further research can assist in early identification of these abnormalities, provide resources for professionals who work with these patients, and contribute to improving the quality of life of these individuals.

[Vestibular system in patients with systemic sclerosis]

OBJECTIVES

In systemic sclerosis (SSc) there may occur hearing and balance disorders as a result of the immune-mediated inner ear damage, the etiology being vasculitis and fibrosis. The objective is the vestibular organ evaluation in patients with SSc regarding their prevalence and relationship to duration of the disease and Raynaud phenomenon and also to type and severity of SSc.

MATERIAL

Twenty unselected, consecutive patients with diagnosed SSc, complying with international diagnostic criteria of the American Rheumatism Association (1982), were enrolled into the study. The control group consisted of 26 otologically healthy persons matched to the SSc group for age and sex.

METHODS

In all patients the questionnaire about audiovestibular history, otolaryngological examination, static and dynamic vestibular tests and the electronystsgmography (ENG) were performed. The patients were investigated with the electronystsgmography (ENG) for spontaneous, positional and caloric-induced nystagmus. Also visual ocular-motor tests were performer.

RESULTS

In the anamnesis 65% of patients reported vertigo, 55% - headaches, 50% - tinnitus, 40% - hyperacusis, 40% - hearing loss and 30% - ear fullness. Vertigo, dizziness balance disturbance and uncorrect results of Romberg and Utenberger tests were more frequent in patients with vestibular organ lesion. Abnormalities in vestibular organ in SSc patients were fund in 14 (70%) persons - the central type of lesion - 8 (40%), mixed type in 3 (15%) and peripheral in 3 (15%).

CONCLUSIONS

Ear involvement is frequent in systemic sclerosis and should be taken into consideration during diagnostic and therapeutic procedures.

Hearing loss in diffuse cutaneous systemic scleroderma

OBJECTIVES

Patients with diffuse cutaneous systemic sclerosis (dcSSc) have distinct clinical manifestations, usually with more aggressive organ involvement and highermortality than limited cutaneous systemic sclerosis (lcSSC). Hearing loss had not yet been evaluated in this subtype, so our aim was to assess the auditory system of dcSSc patients in a controlled study.

METHODS

Twenty-six patients with dcSSc, according to American College of Rheumatology (ACR) criteria, were evaluated. For each dcSSc patient included in the study, two healthy controls were matched for sex and age (± 2 years). All patients responded to a structured questionnaire regarding otological symptoms and risk factors with regard to hearing loss. A complete ear/nose/throat physical examination was performed followed by speech/pure tone audiometry and impedance measurements.

RESULTS

The mean age of the dcSSc patients was 47.0 ± 11.9 years; the mean disease duration was 9.4 ± 9.1 years, and there was a clear female predominance (83%). The questionnaire revealed auditory complaints in 54% of the dcSSc patients (25% hearing loss, 21% aural fullness, 21% tinnitus, and 21% dizziness) and normal otoscopy. Nearly half (46%) of the dcSSc patients were diagnosed as having hearing loss on audiogram compared to only 19% in the control group (p = 0.01). All dcSSc with hearing loss had a sensorineural component, eight (73%) with excellent discrimination on the Percentage Index of Speech Recognition (PISR). Descending configuration and Metz recruitment were observed in 54% of these patients, suggesting cochlear involvement.

CONCLUSION

Patients with dcSSc have a high prevalence of sensorineural audiometric hearing impairment and otological complaints, suggesting that the cochlea is an additional target organ in this disease.

Audiovestibular manifestations in patients with ankylosing spondylitis

Ankylosing spondylitis (AS) is a chronic inflammatory disease of unknown origin affecting up to 1% of the population. Little is known about audiovestibular impairment in patients with AS, especially the presence of cochleovestibular dysfunction in these patients. To investigate audiovestibular manifestations in AS, we studied a series of 50 consecutive patients who fulfilled the modified New York diagnostic criteria for AS and 44 matched controls. Individuals with history of cardiovascular disease, cerebrovascular complications, peripheral artery disease, renal insufficiency, syphilis, Meniere and other vestibular syndromes, infections involving the inner ear, barotrauma, or in treatment with ototoxic drugs were excluded. Most patients with AS were men (80%). The mean age at the time of study was 52.5 years, and mean age at the onset of symptoms was 34.4 years. Twenty-nine (58%) patients showed abnormal hearing loss in the audiogram compared to only 8 (18%) controls (p < 0.001). Values of audiometric tests (pure-tone average and speech reception threshold) yielded significant differences between patients and controls (p < 0.001). It is noteworthy that the audiogram shape disclosed a predominant pattern of high-frequency sensorineural hearing loss in AS patients (50%) compared to controls (18%) (p = 0.002). Also, AS patients exhibited abnormal vestibular tests more commonly than controls. AS patients had an increased frequency of head-shaking nystagmus (20%) compared to controls (0%) (p < 0.001). Moreover, patients (26%) showed a significantly increased frequency of abnormal caloric test compared to controls (0%) (p < 0.001). Finally, a significantly increased frequency of abnormal clinical test of sensory integration and balance with a predominant vestibular loss pattern was observed in patients (36%) compared to controls (5%) (p < 0.001). In conclusion, the current study demonstrates strong evidence for inner ear compromise in patients with AS.

Hearing organ disorders in patients with systemic sclerosis

In systemic sclerosis (SSc), there may develop hearing and balance disorders as a result of the immune-mediated vasculitis and fibrosis in the inner ear. The objective of the study was evaluation of the hearing organ function in patients with SSc with relationship to duration of the disease and Raynaud phenomenon and also to type and severity of the disease. Twenty unselected, consecutive patients with SSc diagnosed in compliance with the international diagnostic criteria of the American Rheumatism Association (1982), were enrolled into the study. The control group consisted of 26 otologically healthy persons matched to the SSc group for age and sex. Case history was recorded for all patients from questionnaire data. Otolaryngological examination and battery of audiological tests (pure tone audiometry, speech audiometry, impedance audiometry and auditory brainstem response-ABR) were performed. In the anamnesis 60% of patients reported vertigo, 55% headaches, 50% tinnitus, 40% hyperacusis, 40% hearing loss and 30% ear fullness. It was found that patients with SSc had significantly poorer mean hearing thresholds than the control group for 0.5, 1, 6 and 8 kHz. In ABR there were no differences between SSc and control groups although an increase of latency averages in the group of limited patients with SSc compared with the diffuse patients with SSc was observed. In eight patients (40%) sensorineural hearing loss, mostly bilateral and symmetrical was found. Furthermore, no relation was seen between hearing level and duration, type and severity of the disease. Ear involvement is frequent in systemic sclerosis and should be taken into consideration during diagnostic and therapeutic procedures.

[Auto-immune sensorineural deafness: physiopathology and therapeutic approach]

Sensorineural hearing loss may be due to an autoimmune mechanism. The mechanisms that could induce autoimmune inner ear damage are now better understood, but are not exclusive. Moreover, there is no specific immunologic test available for the diagnosis of autoimmune sensorineural hearing loss, which could also complicate the disease course of other autoimmune systemic diseases. Thus, the incidence of sensorineural autoimmune hearing loss is probably underestimated. The aim of this study was to review the experimental immunologic data in favour of an autoimmune mechanism in this subgroup of sensorineural hearing loss: humoral specific response against inner ear (autoantibodies against a transmembrane transporter) and also cellular response (against cochlin: one of the major proteins expressed in the inner ear). The aim of this review was also to focus on clinical and epidemiological human data that provide evidence for an autoimmune etiopathogeny of some sensorineural hearing loss. Therapeutic options such as immunosuppressive treatments (oral corticosteroids and other immunosuppressive drugs, such as methotrexate and anti-TNFalpha) are also discussed.

Audiovestibular manifestations in patients with limited systemic sclerosis and centromere protein-B (CENP-B) antibodies

Audiovestibular dysfunction has been reported in patients with connective tissue disease. Systemic sclerosis (SSc; scleroderma) is a rare connective tissue disease of unknown etiology. In the current study we assess whether audiovestibular involvement is present in patients with limited scleroderma (lSSc). To answer this question we studied a series of 35 consecutive patients who fulfilled well-established classification criteria for lSSc and had antibodies against the major centromere protein-B (CENP-B), and 59 matched controls. Individuals with a history of cerebrovascular complications, syphilis, Ménière and other vestibular syndromes, infections involving the inner ear, barotrauma, or in treatment with ototoxic drugs were excluded. The majority of patients with lSSc were women (94%). The mean age at time of study was 64.5 years, and the mean age at time of disease diagnosis was 56.9 years. Besides Raynaud phenomenon, most patients with lSSc had other typical features of CREST (calcinosis, Raynaud phenomenon, esophageal hypomotility, sclerodactyly, and telangiectasia) syndrome. Twenty-seven (77%) patients showed abnormal hearing loss in the audiogram compared with only 15 (26%) of the controls (p < 0.001). Values of audiometric tests (pure-tone average and speech reception threshold) yielded significant differences between patients and controls (p < 0.001). The typical pattern of hearing impairment in our series of lSSc patients was a bilateral and symmetrical sensorineural hearing loss with a flat pattern in the audiogram. Abnormal tympanogram and abnormal stapedial reflex were more commonly observed in patients than controls (p < or = 0.001). Similarly, a significantly increased frequency of abnormal oculocephalic response (10 patients, 29%) and head-shaking nystagmus (9 patients, 26%) was observed in patients compared with controls (p < 0.001 for both comparisons). Finally, a significantly increased frequency of abnormal caloric test and clinical test of sensory integration and balance was observed in lSSc patients (31% and 46% of patients, respectively) compared with controls (0% and 12%, respectively) (p < 0.001 for both comparisons). The current study demonstrates strong evidence for inner ear compromise in patients with lSSc.

Auditory neuropathy in systemic sclerosis: a speech perception and evoked potential study before and after cochlear implantation

We report the results of speech perception and electrophysiological evaluation of the auditory periphery performed before and after cochlear implantation in a 18-year-old girl with systemic sclerosis (SS) who presented the clinical picture of auditory neuropathy. Transtympanic electrocochleography (ECochG) in response to 0.1 ms clicks was recorded 1 month before cochlear implantation on both sides while the electrically evoked neural response was obtained intraoperatively in the right ear through cochlear implant stimulation. The ECochG recordings revealed the presence of the cochlear microphonic with normal amplitude and threshold on both sides. A compound action potential was only detected in the left ear at high stimulation intensity, while the electrically evoked neural response was clearly identifiable at all the recording sites during neural response telemetry. Standardized speech perception tests were performed 1 month before cochlear implantation and several times after cochlear implant connection. Speech perception scores were close to chance before cochlear implantation while they showed a remarkable improvement thereafter. The results of this study show that subjects affected by SS could present the clinical picture of auditory neuropathy which is possibly underlain by lesions involving the distal portion of auditory nerve fibers and/or synapses with inner hair cells. The restoration of synchronous neural discharge could be achieved by electrical stimulation through cochlear implant.

Autoimmune sensorineural hearing loss

Autoimmune sensorineural hearing loss has been increasingly recognized as a clinical entity since its description by McCabe in 1979. Recognition and proper management of this condition is important, as it is one of the very few forms of sensorineural hearing loss that can be successfully treated by medical therapy. Recent studies have provided experimental evidence to suggest that immune processes can cause sensorineural hearing loss in animals and humans. However, antigenic targets within the inner ear are diverse and as a result conclusive evidence for specific autoimmune damage to the inner ear has been elusive. This review focuses on the recent progress in understanding of the aetio-pathogenesis of autoimmune hearing loss along with a description of the various clinical conditions in which they occur. Recent advances in the laboratory diagnosis and management of this interesting condition are also described.

Hearing loss in progressive systemic sclerosis patients: a comparative study

OBJECTIVE

To investigate the middle and inner ear involvement in patients with progressive systemic sclerosis (PSS).

STUDY DESIGN AND SETTINGS

We prospectively evaluated 34 PSS patients. All patients underwent a complete ear-nose-throat physical examination and audiological evaluation with pure tone, impedance, and speech audiometry. In addition, systemic manifestations of the disease and drug therapy were recorded. Finally, all patients were tested for the presence of autoantibodies. The results were compared with those of 45 age-matched healthy subjects.

RESULTS

We found a sensorineural hearing loss in 20% and mixed type hearing loss in 3.3% of the patients. There was no correlation of hearing loss with age, systemic manifestations of the disease, presence of autoantibodies, and drug therapy. Ten percent of the patients had patulous eustachian tubes.

CONCLUSION

One fourth of PSS patients had a hearing loss affecting the middle and mainly the high frequencies. This is a lower percentage than that reported by other investigators. A significant prevalence of bilateral patulous eustachian tubes was noticed as well. Further investigation is needed for a better understanding of the mechanism of ear damage in PSS patients.

Progressive sensorineural hearing impairment in systemic vasculitides

OBJECTIVES

A large series of patients with various forms of systemic vasculitis were evaluated to analyze the prevalence of progressive sensorineural hearing loss (PSNHL), its characteristics and evolution, and the effects of different therapies.

METHODS

A total of 673 patients were questioned about the presence of subjective audiovestibular disturbances. Of those, 80 subjects complained of subjective audiological disturbances and underwent oto-rhino-laryngological and audiovestibular evaluation. Those patients with progressive hearing impairment were selected and studied carefully.

RESULTS

A PSNHL was observed in 14 patients. The hearing loss was bilateral and asymmetrical in most subjects. It was usually sensorineural, with a cochlear lesion. Unsteadiness was the most frequent vestibular symptom and canal paresis or palsy was noted in most patients. Systemic corticosteroids and cyclophosphamide were useful treatments; in unresponsive patients, satisfactory results were obtained with methotrexate and plasma exchange.

CONCLUSIONS

PSNHL is a rare complication of systemic vasculitis, but occasionally is one of the presenting symptoms. Its clinical evolution is variable, but timely clinical assessment and treatment can positively affect prognosis.