J Rheum Dis 2022; 29(2): 116-122  https://doi.org/10.4078/jrd.2022.29.2.116
Idiopathic Inflammatory Arthritis in the Auditory Canal in a Patient With Hearing Impairment: A Case Report and Literature Review
So Hye Nam, M.D.1, Gi Hwan Kim, M.D.2, Hong Ju Park, M.D., Ph.D.3, Yong-Gil Kim, M.D., Ph.D.4
1Division of Rheumatology, Department of Internal Medicine, Uijeongbu Eulji Medical Center, Eulji University School of Medicine, Uijeongbu, Departments of 2Pathology, 3Otorhinolaryngology-Head and Neck Surgery, Asan Medical Center, University of Ulsan College of Medicine, 4Division of Rheumatology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
Correspondence to: Yong-Gil Kim, http://orcid.org/0000-0002-8029-7355
Division of Rheumatology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Korea. E-mail: bestmd2000@amc.seoul.kr
Received: February 5, 2021; Revised: April 23, 2021; Accepted: April 29, 2021; Published online: April 1, 2022.
© Korean College of Rheumatology.

This is a open Access article, which permits unrestricted non-commerical use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Inflammatory arthritis can affect the auditory system during the disease course. Although most cases show asymptomatic hearing impairment, it can result in hearing loss. Here we describe the case of a 70-year-old female with hearing impairment associated with idiopathic inflammatory arthritis in her auditory system. She had suffered from hearing difficulties for decades; however, the causes of her hearing impairment had not been evaluated. Pure tone audiometry showed severe sensorineural hearing loss requiring a cochlear implant. The workup for the cochlear implant revealed erosive changes in the incudomalleolar and incudostapedial joints with soft tissue swelling on temporal bone computed tomography. Bone pathology revealed plasmacytic infiltration and granulomatous inflammation. Laboratory examinations showed elevated levels of inflammatory markers; otherwise, she had negative results for all autoantibodies. In patients with idiopathic hearing loss, inflammatory arthritis of the middle ear without peripheral arthritis can provide a clue regarding the cause of the hearing loss.
Keywords: Arthritis, Middle ear, Hearing loss, Cochlear implantation
INTRODUCTION

Hearing impairment has been reported in patients with autoimmune diseases including rheumatoid arthritis (RA), juvenile idiopathic arthritis (JIA), systemic lupus erythematosus (SLE), and vasculitis [1-10]. Among autoimmune diseases, previous studies have described the association between hearing impairment and RA [10-28]. While hearing impairment has been reported to occur in up to 60% of patients with RA, its pathogenesis is not clear [11]. Sensorineural hearing loss was the most common hearing impairment, occurring in up to 80% of cases, following by conductive hearing loss [13,15]. While conductive hearing loss can be caused by arthritis of the incudostapedial and incudomalleolar joints, sensorineural hearing loss can be associated with inflammation of the inner ear, as well as vasculitis, neuritis, or deposition of immune complex, which result in cochlear damage [15-18]. The risk factors for hearing impairment in RA include old age, male, long disease duration, and anti-citrullinated peptide antibody (ACPA) positivity [13-15]. However, to our knowledge, there has been no report of the association of hearing impairment with inflammatory arthritis in the ossicular chains without RA. Herein, we report a case in an older female with no peripheral symptoms of inflammatory arthritis who experienced hearing loss with joint abnormalities in both middle ears.

CASE REPORT

A-70-year-old female was referred to the otolaryngology clinic of a tertiary hospital in Seoul, South Korea, for worsening hearing difficulty in both ears and dizziness that had developed in the last month. She had hearing impairment in her right ear that had developed decades prior and had been listening only with her left ear with a hearing aid for more than 10 years; however, the cause of her hearing impairment had not been evaluated. Her current medications included amlodipine; candesartan; atorvastatin; and methimazole for hypertension, dyslipidemia, and hyperthyroidism, which she had taken for more than 1 year. She had never smoked and denied alcohol abuse. A history of noise trauma and injury in both ears was not reported, and there was no family history of hearing loss. She presented with non-whirling type vertigo with intermittent tinnitus, which was aggravated when walking. Caloric, head impulse, and rotational chair tests confirmed the bilateral loss of vestibular function, which could explain the aggravation of dizziness when walking. No symptoms including ear fullness, headache, nausea, vomiting, visual change, or dysarthria were found. Before visiting our hospital, high-dose corticosteroid treatment was tried for several days due to suspected sudden sensorineural hearing loss 6 months prior; however, the response was poor. The otoscopic examination did not reveal any evidence of chronic otitis media. Pure-tone audiometry indicated severe sensorineural hearing loss and reduced speech recognition in both ears (Figure 1A); therefore, cochlear implantation in her left ear was recommended. High-resolution magnetic resonance imaging for the assessment of the cochlear nerve was normal, however, temporal bone computed tomography revealed erosive change and deformities of both incudomalleolar and incudostapedial joints with soft tissue swelling (Figure 2). Based on these findings, the patient underwent consultation from a rheumatologist for underlying rheumatic disease. The patient had no tender joints or swollen joints suggestive of systemic inflammatory arthritis such as RA. The results of laboratory studies were within normal values, including complete blood cell count, C-reactive protein, and autoantibodies (rheumatoid factor, anti-nuclear and ACPA), except for an elevated erythrocyte sedimentation rate (ESR, 49 mm/hr). To define the underlying cause of joint deformities in the middle ear, a biopsy was obtained from the arthritic part while performing cochlear implantation in the left ear. The pathologic findings of incus areas revealed plasmacytic infiltration and granulomatous inflammation (Figure 3). No acid-fast bacilli were identified on Ziehl–Neelsen staining and no fungal organisms were identified on Gomori’s methenamine silver staining. As patients did not present any clinical manifestations suggesting granulomatosis with polyangiitis (GPA) such as sinusitis, chronic otitis media, and there was no evidence of vasculitis in pathologic examination. The patient was discharged on the sixth hospital day and visited a rheumatology outpatient clinic 4 weeks after discharge. Due to the patient’s persistently high ESR, low-dose prednisolone (10 mg/day) and methotrexate (7.5 mg/week) were prescribed for non-infectious chronic inflammatory arthritis. Two months after the cochlear implantation, the patient’s hearing level was improved, with an aided audiogram showing a 30 dB threshold through all frequencies (Figure 1B).

Figure 1. Pure-tone audiometry. (A) Before cochlear implant, severe sensorineural hearing loss of both ears observed. (B) Two months after cochlear implant, aided audiogram showed a 30 dB threshold through all frequencies.

Figure 2. Pathology slides demon-strating chronic osteitis in the left incus (H&E, ×400). (A) Lymphoplasmacytic infiltration (triangles). (B) Granulomatous inflammation (arrow).

Figure 3. CT findings of the temporal bone. CT scan of the right middle ear cavity of a 70-year-old female with hearing loss. The arrows indicate the erosive change and deformity of the incudomalleolar joints with soft tissue infiltration (A, C) in the axial plane and soft tissue infiltration at the stapes in the stenvers plane (B). CT: computed tomography.
DISCUSSION

Hearing impairment occurs in 37%~60% of adults aged 61~80 years [29]. Among them, age-related sensorineural hearing loss followed by noise trauma, Meniere disease, infection, medication, and autoimmune disease, is the most common [29]. The patient in the present case thought that her hearing loss was simply a sensorineural defect. However, her evaluation for a cochlear implant incidentally revealed erosive arthritis of the middle ear and the pathology findings in incus showed granulomatous inflammation. Granulation tissue in middle ear can be observed in various disease such as tuberculosis, fungal infection, Langerhans cell histiocytosis, and chronic inflammatory disease [30]. Because there was no evidence of infection or chronic otitis media, we considered that autoimmune disease might contribute to patient’s hearing dysfunction. In autoimmune disease, sarcoidosis, GPA, RA can present granulation tissue [31-33]. However, the inflammation is limited to the ear, and clinical symptoms and signs suggesting sarcoidosis, RA, and GPA were not presented. Furthermore, pathological findings revealed no evidence of vasculitis. Therefore, the patient’s arthritis could not be defined yet as a specific rheumatic disease.

Hearing impairment caused by autoimmune diseases is mostly discussed in patients with RA, followed occasionally by SLE, ankylosing spondylitis, and JIA [2-10]. We reviewed articles on hearing loss related to inflammatory arthritis (Table 1). Although hearing impairment occurs frequently in patients with autoimmune disease, the pathogenesis of hearing impairment remains controversial [13,15]. Bone defects in the middle ear were observed in murine models of RA and destruction of the incudostapedial and incudomalleolar joints can result in impaired conduction [18,34]. However, it does not necessarily lead to a hearing impairment [6,17,23]. Previous studies showed that sensorineural hearing loss, rather than conductive hearing loss, is the predominant type of hearing impairment in autoimmune disease [2,5,27,28]. Although the As type-tympanogram was more observed in RA patients than the controls, all the patients with hearing impairment presented sensorineural hearing loss [17]. Sensorineural hearing loss can be caused by damage to the inner ear and cochlear hair cell and can also be impaired by vasculitis, neuritis, or the deposition of immune complexes in patients with RA [4,5]. As patients with RA have various forms of hearing impairment, joint damage in the middle ear and inflammatory changes in the inner ear may cause conductive hearing impairment, sensorineural hearing loss, and mixed-type loss. The present case showed sensorineural hearing impairment on pure-tone audiometry, and conductive impairment was not found even with inflammatory arthritis in both the middle ears simultaneously. Thus, it was difficult to determine the impact of the joint damage in her middle ear on her hearing impairment. However, the damage was evidence of an antecedent inflammatory process that mimicked RA and might be related to hearing impairment.

Table 1 . Literature on hearing impairment in patients with systemic inflammatory arthritis.

AuthorDiseaseNumber of patientsMean age (yr)Hearing impairment, number (%)Abnormal tympanogram, number (%)Pathology findings of the middle earFindings
Goodwill et al. [22]RA7652.87 (9.2)
: SNHL 5, CHL 2
NoneBone absorption, fibrous tissueHL was not related with RA duration or activity
Rosenberg et al. [23]RA68N/ANone16 (42)(-)The conducting system was abnormal in RA but HL is rare
Poorey and Khatri [24]RA25N/A16 (64)
: SNHL 13, CHL 3
8 (32)(-)CHL was common in early and active RA
Ozcan et al. [11]RA3747.719 (51.4)
: SNHL 10, MHL 4, CHL 5
14 (37.8)(-)HL could be caused by multifocal involvement of the audiologic system in RA
Takatsu et al. [17]RA3654.613 (36.1)
: SNHL 13
18 (25)(-)SNHL is related to ESR and plasma IL-6, and MMP-3. Latent-type CHL can be caused by stiffness of the middle ear
Halligan et al. [25]RA2963 (median)17 (59)
: SNHL 13, MHL 1, CHL 3
5 (17)(-)No difference in audiometric measurement between patients with RA and controls
Milisavljevic et al. [18]RA966.9N/AN/A(-)SEM showed increased lysis and surface degeneration of the auditory ossicles in patients with RA
Tavernier and Ranfaing [26]RA159.0MHLN/AMass consisting of fibrous tissue riddled with inflammatory elements, primarily mononucleatesInflammatory fibrous tissue in the middle ear could result in HL in patients with RA
Pascual-Ramos et al. [27]RA11343.327 (24)
: SNHL 25, MHL 2
20 (18)(-)SNHL the most common type of HL in patients with RA, and older age was a risk factor for HL
Lobo et al. [14]RA4348.920 (46.5)
: SNHL 16, MHL 2, CHL 2
6 (11.9)(-)SNHL was the main HL in patients with RA and was associated with anti-citrullinated peptide antibodies
Ahmadzadeh et al. [28]RA4253.09 (21.3)
: SNHL 5, MHL 1, CHL 3
13/84 ears (15.4)(-)SNHL was more prevalent in patients with refractory RA
Magarò et al. [8]AS156CHL+(-)CHL can be induced by ear arthritis in patients with AS
Casellini et al. [5]RA/ASRA 19
AS 22
RA 56
AS 45.5 (median)
RA 13 (68.4)
: SNHL 11, MHL 1, CHL 1
AS 15 (68.2)
: SNHL 13, CHL 2
RA 4 (14.3)
AS 3 (15.8)
(-)HL can occur in patients with AS patients as well as those with RA. Small numbers of patients with otosclerosis among those with AS
Dagli et al. [4]AS2834.310 (35)
: SNHL 10
None(-)Damage of the outer hair cells in patients with AS
Adam et al. [3]AS4539.632 (71.1)
: SNHL 32
N/A(-)High-frequency SNHL was common in AS; risk factors include disease duration and extraspinal involvement
Amor-Dorado et al. [9]AS5052.529 (58)
: SNHL 29
4 (8)(-)High-frequency SNHL and abnormal vestibular tests more common in patients with AS than controls.
Amor-Dorado et al. [2]PsA6052.936 (60)
: SNHL 36
N/A(-)High-frequency SNHL was the predominant pattern of HL in patients with PsA
Siamopoulou-Mavridou et al. [7]JIA1810.6N/A17/36 ears (47.2)(-)JIA changes middle ear function by stiffness of the tympanic membrane and ossicular chain
Takatsu et al. [17]JIA1912.2None12/38 ears (31.6)(-)A dual effect of JIA on both the middle and inner ears

RA: rheumatoid arthritis, SNHL: sensorineural hearing loss, CHL: conductive hearing loss, HL: hearing loss, N/A: not available, MHL: mixed hearing loss, ESR: erythrocyte sedimentation rate, IL-6: interleukin-6, MMP-3: matrix metalloproteinase-3, SEM: scanning electron microscope, AS: ankylosing spondylitis, PsA: psoriatic arthritis, JIA: juvenile idiopathic arthritis..



The development and severity of hearing impairment could be related to disease activity [14,35]. The patient was administered methotrexate and prednisolone to control the inflammation in her ear. However, the roles of disease-modifying anti-rheumatic drugs (DMARDs) and corticosteroids in the recovery of hearing function are uncertain [1,15,16]. Therefore, further studies are needed to assess the role of DMARDs on hearing recovery in patients with inflammatory arthritis who receive cochlear implants.

SUMMARY

This case is the first report of suspected hearing loss related to inflammatory arthritis in the middle ear without evident RA. Our experience supported the theory that hearing impairment occurs through a multifocal involvement of the auditory system, including cochlear hair cells and ossicles. Therefore, additional studies are required on inflammatory arthritis of the auditory canal without features of systemic autoimmune in patients with unknown causes of hearing impairment.

FUNDING

None.

CONFLICT OF INTEREST

No potential conflict of interest relevant to this article was reported.

AUTHOR CONTRIBUTIONS

Conceptualization: H.J.P. and Y.G.K. Data acquisition: S.H.N. and G.H.K. Writing—original draft: S.H.N. Writing—review & editing: H.J.P. and Y.G.K.

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