Congenital Retrosigmoid Cholesteatoma: Case Series and Literature Review.

BACKGROUND: This study aimed to discuss 3 cases of congenital cholesteatoma located posterior to the sigmoid sinus, with no/minimal involvement of mastoid, and compare them with cases presented in the literature to better define this rare entity. METHODS: Retrospective chart analysis of 3 congenital cholesteatomas located posterior to the sigmoid sinus treated surgically in 2 skull-base centers and literature review. Though congenital cholesteatoma can arise outside the middle ear, only a few cases presenting in the retrosigmoid occipital bone have been described earlier. RESULTS: In all 3 patients, there was a delay in the presentation, as symptoms were nonspecific or lacking, leading in 1 case to severe complications. Computed tomography and magnetic resonance imaging, especially diffusion-weighted imaging scans, allowed accurate diagnosis and surgical planning. Surgery happened to be challenging due to the tight adherence of the cholesteatoma to the thinned dural surface. Complete excision was achieved in all the cases. CONCLUSION: Congenital cholesteatoma located posterior to the sigmoid sinus is a rare entity and is even more exceptional after a critical review of the literature. Complete excision is quintessential to prevent intradural extension or infection. The most important surgical issue is the management of the posterior fossa dura and the sigmoid sinus. We recommend meticulous dissection with slow peeling of the epithelial lining from the dura. Bipolar coagulation of the dura may help in avoiding recidivism. Moreover, cerebrospinal fluid (CSF) leak during dissection has to be avoided as long as possible, because the loss of tension of the already thinned dura makes its peeling particularly difficult.

Evaluation of the transmastoid plugging approach for superior semicircular canal dehiscences: a retrospective series of 30 ears.

PURPOSE: The classical surgical approach for superior semicircular canal dehiscences (SSCD) is via the extradural middle cranial fossa. This pathway is used to resurface or to plug the SSC. In this paper, we present long-term data on an alternative route: the transmastoid pathway. The predictive factors for a successful surgery are equally presented in this paper. METHODS: Thirty reports of patients operated between September 2007 to January 2020 were analysed. SSCD was confirmed by the association of concordant complaints, audiometric data, cervical vestibular evoked myogenic potentials (cVEMP) responses and computerized tomography findings. Before and after surgery, the following factors were analysed: auditory and vestibular subjective symptoms, Tullio phenomenon, pure-tone audiometry thresholds for air and bone conduction, air-bone gap, cVEMP threshold, and computerized tomography data, for instance the size of the dehiscence. RESULTS: The follow-up is 21 months on average. The transmastoid approach significantly improves all symptoms (although there were less probing results for the vestibular symptoms). Objectively, we can observe, a closure of the audiometric air-bone gap on the low frequencies and an improvement in the cVEMP. The only correlation that was identified was between the preoperative cVEMP results and the postoperative air conduction. CONCLUSIONS: The originality of this study is the long postoperative follow-up. It allowed us to evaluate the symptoms in the long term and to determine a predictive factor of postoperative complication, which has not yet been described until today.The transmastoid plugging technique is safe and effective. Additional long-term data with a larger cohort are needed to confirm our results and correlation studies.

Decompression of the internal auditory canal via the retrosigmoid approach in a patient with Camurati-Engelmann disease: illustrative case.

BACKGROUND: Camurati-Engelmann disease (CED) is a rare condition characterized by hyperostosis of the long bones and skull base. Symptoms include contractures and pain in affected extremities but can also include manifestations of cranial hyperostosis such as intracranial hypertension, Chiari malformation, exophthalmia, frontal bossing, and several cranial neuropathies due to cranial foraminal stenosis. OBSERVATIONS: This report describes a 27-year-old patient with suspected CED who developed progressive intermittent facial nerve paresis, hemifacial spasms, and a decrease in hearing. There were no symptoms of increased intracranial pressure or vertigo. Radiological evaluation showed a significant thickening of the skull base with serious bilateral internal auditory canal stenosis. Because of the progressive nature of the aforementioned cranial neuropathies in combination with the correlating severe radiological compression, a surgical decompression of the facial nerve and vestibulocochlear nerve was performed via a retrosigmoid approach with intraoperative monitoring. Postoperative facial nerve function was intact. Hearing and vestibular function were unchanged. There were no more episodes of facial nerve palsy or spasm. LESSONS: To the authors' knowledge, this is the first report to describe decompression of the internal auditory canal via a retrosigmoid approach for symptomatic facial and cochlear nerve compression in a patient with CED.

Cochlear Patency after Translabyrinthine and Retrosigmoid Vestibular Schwannoma Surgery.

OBJECTIVES: To assess the incidence and onset of cochlear obliteration after translabyrinthine and retrosigmoid vestibular schwannoma surgery. MATERIALS AND METHODS: We retrospectively identified a consecutive series of eighty ears in eighty vestibular schwannoma patients who were treated via a translabyrinthine or retrosigmoid approach by a single neuro-otological surgical team in a tertiary referral center from May 2011 to January 2018. Postoperative, high- resolution T2-weighted turbo spin echo three-dimensional magnetic resonance (MR) images of the posterior fossa were evaluated at the level of the membranous labyrinth and internal auditory canal. Perilymphatic patency of the vestibule, basal, and apical cochlear turns were scored and classified as patent, hypointense, partially obliterated, or completely obliterated. RESULTS: Twenty-five vestibular schwannomas were treated with surgery via a translabyrinthine approach, and fifty-five were treated using a retrosigmoid approach; of these, 8% and 65%, respectively, showed no signs of perilymphatic alterations in the basal or apical turns, while 84% and 20%, respectively, showed partial or complete obliteration in the basal or apical turns with a mean postoperative interval of 127 and 140 days, respectively. All the patients who underwent multiple MR scans and had a completely patent perilymphatic system on the first postoperative scan remained patent during subsequent scans; 16% of the patients showed worsened perilymphatic appearance. The onset of cochlear obliteration occurred within 2-7 months in most translabyrinthine patients. CONCLUSION: These findings may support the need for simultaneous cochlear electrode or dummy implantation in translabyrinthine surgery. Second-stage implantation could be feasible in cases where a retrosigmoid approach is used; however, the implantation should be considered within the initial months to avoid cochlear obliteration. Findings on the first postoperative MR could indicate the need for intensified MR follow-up and may even predict the occurrence of cochlear obliteration.

Intratemporal facial nerve schwannomas: multicenter experience of 80 cases.

PURPOSE: To provide more data on the clinical presentation and natural evolution of facial nerve schwannomas and to provide guidance for therapeutic decision making. METHODS: A retrospective case review of eighty patients diagnosed with a facial nerve schwannoma between 1990 and 2018 in ten tertiary referral centers in Europe was performed. Patients' demographics, symptomatology, audiometry, anatomical site (segments involved), size and whenever possible volume measurement were registered. RESULTS: At presentation, transient or persistent facial palsy was the most common symptom, followed by hearing loss. The schwannoma involved more than one segment in the majority of the patients with the geniculate ganglion being most commonly involved. Initial treatment consisted of a wait and scan approach in 67.5%, surgery in 30% and radiation therapy in 2.5% of the patients. Tympanic segment schwannomas caused mainly conductive hearing loss and were more prone to develop facial palsy at follow-up. Internal auditory canal or cerebellopontine angle schwannomas presented with significantly more sensorineural hearing loss. CONCLUSIONS: Although modern imaging has improved diagnosis of this tumor, choosing the best treatment modality remains a real challenge. Based on the literature review and current findings, more insights into the clinical course and the management of facial nerve schwannomas are provided.

Cochlear Erosion due to a Facial Nerve Schwannoma.

Facial nerve schwannomas are rare benign neoplasms. We report a case of a 60-year-old woman who initially presented with vestibular complaints. Magnetic resonance imaging (MRI) revealed a facial nerve schwannoma centered on the right geniculate ganglion extending in the labyrinthine segment. The patient consulted again after 2 months because she developed a sudden and severe right-sided sensorineural hearing loss. MRI showed no progression or pathological enhancement in the membranous labyrinth. A cone beam computed tomography (CT) of the temporal bone was performed and revealed a large erosion at the region of the geniculate ganglion in open communication with the middle turn of the cochlea. This case report demonstrates the importance of CT in facial nerve schwannomas for evaluating the impact on the surrounding structures.

The Value of Diffusion-Weighted MRI in the Long-term follow-up After Subtotal Petrosectomy for Extensive Cholesteatoma and Chronic Suppurative Otitis Media.

OBJECTIVE: To report the long-term follow-up with diffusion-weighted magnetic resonance imaging (DW MRI) after subtotal petrosectomy (SP) with blind sac closure of the external auditory canal for extensive cholesteatoma and chronic suppurative otitis media. STUDY DESIGN: Retrospective clinical record study. SETTING: Tertiary referral center. PATIENTS: Thirty-one patients (31 ears) with extensive cholesteatoma and 17 patients (19 ears) with chronic suppurative otitis media without cholesteatoma who underwent SP between July 1995 and December 2015. INTERVENTIONS: All 48 patients were followed clinically and with DW MRI to rule out residual cholesteatoma. MAIN OUTCOME MEASURE: Residual cholesteatoma, indicated by a marked hyperintensity on non-echoplanar (non-EP) DW MRI. RESULTS: In the cholesteatoma group the mean interval between surgery and the latest DW MRI was 3.9 years. Seven patients presented with a residual cholesteatoma pearl. The mean interval between surgery and detection of residual disease was 3.7 years. In the chronic suppurative otitis media group the mean interval between surgery and the latest DW MRI was 5.3 years. Residual cholesteatoma was found in three patients. Mean interval between surgery and the detection of disease was 4.5 years. CONCLUSIONS: This study shows the importance of DW MRI in the follow-up after SP for cholesteatoma and chronic suppurative otitis media. A little higher residual cholesteatoma rate was found compared with earlier studies, where patients were followed only clinically. One may wonder whether reintervention is always needed or whether in selected cases with small pearls, one may still observe these by a watchful waiting policy with DW MRI.

The Bony Obliteration Tympanoplasty in Pediatric Cholesteatoma: Long-term Hearing Results.

OBJECTIVE: To present the hearing results of a 5-year longitudinal study in a pediatric population undergoing surgery for extensive cholesteatoma using a canal wall up (CWU) approach with bony obliteration of the mastoid and epitympanic space, with a standard residual rate of 5.8%, a recurrence rate of 2.9%, and all ears waterproof, free of otorrhea and all external ear canals patent and self-cleaning. STUDY DESIGN: Retrospective consecutive study. PATIENTS: Thirty-three children (≤18 yr) undergoing surgery for cholesteatoma (34 ears) between 1997 and 2009. INTERVENTIONS: Therapeutic. SETTING: Tertiary referral center. MAIN OUTCOME MEASURES: Hearing and gain in hearing at 1- and 5-year postsurgery: (1) pure-tone average (PTA), (2) pure-tone average high frequency, (3) pure-tone average including 3 kHz, (4) bone conduction at corresponding frequency averages, (5) gain at corresponding air conduction and bone conduction (gain at corresponding air conduction) frequency averages. (6) The Amsterdam Hearing Evaluation Plots were used to study the individual cases. RESULTS: The Amsterdam Hearing Evaluation Plots at 5-year showed in 58.8% of patients a positive gain air conduction. In 23.5% a successful functional result was achieved, defined as an air-bone gap closure to 20 dBHL or less. In 6 patients (17.6%) a limited bone conduction deterioration was shown all limited to maximum 20 dBHL. CONCLUSION: The CWU bony obliteration tympanoplasty in a consecutive series of pediatric extensive cholesteatoma shows a similar to slightly improved hearing outcome as compared with CWU surgery without BOT. Although the series shows a clearly reduced reoperation rate and a significantly improved safety and hygienic outcome as compared with CWU without BOT, better hearing outcomes remain desirable in this group of children.

What is the Required Frequency of MRI Scanning in the Wait and Scan Management?

The wait and scan policy is being increasingly used as the first measure after the diagnosis of a vestibular schwannoma (VS) using magnetic resonance imaging (MRI). As part of the European Academy of Otology and Neuro-Otology (EAONO) position statement on VS, the frequency of imaging has been studied in the literature. Among 163 studies, 29 fulfilled the inclusion criteria and were scored using the Grading of Recommendations, Assessment, Development, and Evaluation system. Because tumor growth rate during the first 5 years of follow-up is predictive of further growth during the upcoming years, a protocol for wait and scan is useful for centers dealing with this condition. The EAONO proposal is that after the initial diagnosis by MRI, a first new MRI would take place after 6 months, annually for 5 years, and then every other year for 4 years, followed by a lifelong MRI follow-up every 5 years. The first early MRI is to screen for fast-growing tumors, and the lifelong follow-up with tapered intervals is to detect late repeated growth.

EAONO position statement on Vestibular Schwannoma: Imaging Assessment Question: How should growth of Vestibular Schwannoma be defined?

The relevance of defining the growth of vestibular schwannoma (VS) is that any significant VS growth may impact treatment strategy. A conservative treatment strategy is often proposed as a primary treatment option in the management of VS. Several authors have demonstrated that a significant proportion of VSs do not grow, and those that do, usually grow slowly. Surgical and/or radiosurgical treatment options may be offered to the patient according to the VS growth. Therefore, defining the VS growth is a determinant in managing treatment strategies. A comprehensive literature search was performed to examine the definition of tumor growth for VS. The literature review was conducted using PubMed and Embase databases dated back to 20 years (1995-2015) and was updated until February 2015. VS growth should be measured on contrast-enhanced T1-weighted images. Although there the overall quality of the present studies is low, all highlight a significant VS growth of > 2 mm, and/or 1.2 cm3, and/or 20% change in volume, and/or the square of the product of the 2 orthogonal diameters. We suggest that VS growth should instead change management strategies when a 3-mm increase in diameter on two consecutive MRI scans are performed 1 year apart.

Surgical Treatment of Acquired Atresia of the External Auditory Ear Canal.

Introduction Acquired atresia of the external auditory canal is characterized by the formation of fibrous tissue in the medial part. The causes include chronic otitis externa, perforated chronic otitis media, postoperative or idiopathic healing problems. Acquired atresia presents with hearing loss and can be associated with otorrhea. Objective We analyzed the results of surgery after six months and two years by checking (1) pre- and postoperative hearing thresholds; (2) presence of otorrhea; and (3) whether a dry and patent ear canal is achieved. Methods We conducted this retrospective study at a tertiary referral center. In total, 27 ears underwent treatment with resection of the fibrotic plug followed by transplantation of a split-thickness skin graft covering the bare bone and tympanic membrane. When necessary, we combined this with a myringoplasty and a (meato-) canalplasty. Results Otorrhea was present in 59.3% of the patients initially and in 14.8% at six months and 11% at two years postoperative. A dry and patent ear canal was obtained in 55.6% after six months and in 89% of the patients after two years ( n = 27). The pure tone average before surgery was 39.1 dBHL (SD = 20 dBHL), at six months 31.4 dBHL (SD = 16.4 dBHL), and at 24 months postop 30.9 dBHL (SD = 17.1 dBHL). We observed a statistically significant improvement of hearing in 63% of the patients at six months ( p = 0.005) and in 65% after two years ( p = 0.022). Conclusions Treatment of acquired atresia remains a challenge. Using the appropriate surgical technique, including skin-grafting and regular postoperative check-up, rendered excellent results regarding otorrhea and a moderate improvement of hearing was achieved in 65% of the patients after two years.

Surgical Treatment of Acquired Atresia of the External Auditory Ear Canal

Abstract Introduction Acquired atresia of the external auditory canal is characterized by the formation of fibrous tissue in themedial part. The causes include chronic otitis externa, perforated chronic otitis media, postoperative or idiopathic healing problems. Acquired atresia presents with hearing loss and can be associated with otorrhea. Objective We analyzed the results of surgery after six months and two years by checking (1) pre- and postoperative hearing thresholds; (2) presence of otorrhea; and (3) whether a dry and patent ear canal is achieved. Methods We conducted this retrospective study at a tertiary referral center. In total, 27 ears underwent treatment with resection of the fibrotic plug followed by transplantation of a split-thickness skin graft covering the bare bone and tympanic membrane. When necessary, we combined this with a myringoplasty and a (meato-) canalplasty. Results Otorrhea was present in 59.3% of the patients initially and in 14.8% at six months and 11% at two years postoperative. A dry and patent ear canal was obtained in 55.6% after six months and in 89% of the patients after two years (n = 27). The pure tone average before surgery was 39.1 dBHL (SD = 20 dBHL), at six months 31.4 dBHL (SD = 16.4 dBHL), and at 24 months postop 30.9 dBHL (SD = 17.1 dBHL). We observed a statistically significant improvement of hearing in 63% of the patients at six months (p = 0.005) and in 65% after two years (p = 0.022). Conclusions Treatment of acquired atresia remains a challenge. Using the appropriate surgical technique, including skin-grafting and regular postoperative check-up, rendered excellent results regarding otorrhea and a moderate improvement of hearing was achieved in 65% of the patients after two years.

The MO-meatocanalplasty: a modification of the M-meatoplasty to address the superior quadrants and the bony canal.

The meatoplasty of the external auditory canal is a frequently performed otologic procedure in recurrent otitis externa, eczema or frequent accumulation of cerumen due to a narrow meatus of the external ear canal. Numerous surgical techniques have been described. The M-meatoplasty described by Mirck for addressing the external meatus is widely used. However, this technique does not sufficiently enlarge the external ear canal in all cases. Specifically in patients where the ear canal narrowing is most prominent in the postero- and/or anterosuperior quadrants of the lateral meatus the technique needs some modifications. In these cases, an oblique conversion of the M-meatoplasty, the MO-meatocanalplasty, is useful. In cases where the bony canal is also narrow this modification allows for a bony canalplasty while avoiding a retro-auricular approach. The MO-meatocanalplasty can be used in combination with myringoplasty and tympanoplasty.

Surgical Management and Hearing Outcome of Traumatic Ossicular Injuries.

OBJECTIVE: The purpose of this study was to investigate etiological, clinical, and pathological characteristics of traumatic injuries of the middle ear ossicular chain and to evaluate hearing outcome after surgery. MATERIAL AND METHODS: Thirty consecutive patients (31 ears) with traumatic ossicular injuries operated on between 2004 and 2015 in two tertiary referral otologic centers were retrospectively analyzed. Traumatic events, clinical features, ossicular lesions, treatment procedures, and audiometric results were evaluated. Air conduction (AC), bone conduction (BC), and air-bone gap (ABG) were analyzed preoperatively and postoperatively. Amsterdam Hearing Evaluation Plots (AHEPs) were used to visualize the individual hearing results. RESULTS: The mean age at the moment of trauma was 27.9±17.1 years (range, 2-75 years) and the mean age at surgery was 33.2±16.3 years (range, 5-75 years). In 10 cases (32.3%), the injury occurred by a fall on the head and in 9 (29.0%) by a traffic accident. Isolated luxation of the incus was observed in 8 cases (25.8%). Dislocation of the stapes footplate was seen in 4 cases (12.9%). The postoperative ABG closure to within 10 and 20 dB was 30% and 76.7%, respectively. CONCLUSION: Ossicular chain injury by direct or indirect trauma can provoke hearing loss, tinnitus, and vertigo. As injuries are heterogeneous, they require a tailored surgical approach. In this study, the overall hearing outcome after surgical repair was favorable.

Long-term Results of Troublesome CWD Cavity Reconstruction by Mastoid and Epitympanic Bony Obliteration (CWR-BOT) in Adults.

OBJECTIVE: To present the long-term surgical outcome of the bony mastoid and epitympanic obliteration technique with canal wall reconstruction (CWR-BOT) in adults with an unstable cavity after previous canal wall-down surgery for extensive cholesteatoma. STUDY DESIGN: Retrospective study. INTERVENTIONS: Therapeutic. SETTING: Tertiary referral center. PATIENTS: Fifty consecutive adult patients undergoing a CWR-BOT between 1998 and 2009. MAIN OUTCOME MEASURE(S): (A) Recurrence and residual rates of cholesteatoma, (B) postoperative hygienic status of the ear, including postoperative aspect of the tympanic membrane and external ear canal integrity (EAC), (C) functional outcome, and (D) long-term safety issues. RESULTS: (A) The percentage of ears remaining safe without recurrent or residual disease after CWR-BOT was 96% after a mean follow-up time of 101.8 months. Recurrent cholesteatoma occurred in 2% (n = 1) and a residual cholesteatoma was detected in 2% (n = 1) of the patients. (B) A safe dry, and trouble-free graft and selfcleaning EAC was achieved in 94%. (C) The postoperative hearing results showed a gain of 1.7 dB on pure-tone average air-conduction. (D) Nonecho planar diffusion-weighted imaging (non-EP DW magnetic resonance imaging) documented the residual (n = 1) and recurrent cholesteatoma (n = 1). The 1- and 5-year imaging follow-up revealed no other recurrent or residual disease. CONCLUSION: The CWR-BOT is a safe and very effective option for treatment of problematic unstable canal wall-down mastoid cavities, resulting in dry trouble-free ears.

Outcome evaluation of the dizziness handicap inventory in an outpatient vestibular clinic.

BACKGROUND: The DHI is a widely used questionnaire for the evaluation of the self-reported disability in patients with dizziness and balance problems. OBJECTIVE: To investigate the relationship between the DHI scores and demographic, symptomatic and diagnostic parameters. METHODS: Retrospective study in 568 patients with balance problems. RESULTS: We observed a total of 61.3% of patients with moderate (DHI total score between 30 and 59) to severe (DHI total score between 60 and 100) disability.Patients with long-standing complaints (lasting longer than 3 months) experience their self-reported disability to a greater extent than patients with new onset pathology (illness duration of one month and less). Moreover, patients suffering from continuous complaints have a larger DHI score than patients with shorter symptom duration. The first effect (new onset vs. long-standing pathology) is primarily caused by emotional factors, the latter effect (symptom duration) is attributable to functional and physical factors, not to emotional aspects. Patients with daily and weekly complaints have larger DHI scores than patients who reported only one episode. Female patients reported larger DHI scores than males. We found no effect of age, diagnostic group (no diagnosis, episodic, acute or chronic vestibular syndrome) or reported symptoms on the DHI scores. CONCLUSIONS: The information retrieved from the DHI questionnaire is complementary to the information obtained from clinical investigation and diagnostic tests and therefore is an essential tool in a vestibular clinic.

The Bony Obliteration Tympanoplasty in Pediatric Cholesteatoma: Long-term Safety and Hygienic Results.

OBJECTIVE: To present the safety and hygienic results of a 5-year longitudinal study in a pediatric population undergoing surgery for extensive cholesteatoma using a canal wall up approach with bony obliteration of the mastoid and epitympanic space. STUDY DESIGN: Retrospective consecutive study. PATIENTS: Thirty-three children (≤18 yr) undergoing surgery for cholesteatoma (34 ears) between 1997 and 2009. INTERVENTIONS: Therapeutic. SETTING: Tertiary referral center. MAIN OUTCOME MEASURES: 1) Residual and recurrent cholesteatoma rates at 5-year postsurgery, 2) postoperative waterproofing and hygienic status of the ear, and 3) required operation rate to achieve the safety and hygienic goals. RESULTS: At 5 years no patients were lost in follow-up. This consecutive series design is rare in chronical otitis media treatment reporting. The standard residual rate at 5 years was 5.8%, representing two residual cholesteatomas in the middle ear. The standard recurrence rate at 5 years was 2.9%, representing one recurrent cholesteatoma. At 5-year follow-up all ears were free of otorrhea and waterproof and all external ear canals were patent and self-cleaning. The operation rate to reach this safety and hygienic status was 1.5 operations per ear at 5-year follow-up. CONCLUSION: The use of a canal wall up approach with obliteration of the mastoid cavity and epitympanic space to surgically treat cholesteatoma in children results in low residual and recurrence rates and a high rate of trouble-free ears in the long term.

Handling an Isolated Malleus Handle Fracture: Current Diagnostic Work-up and Treatment Options.

BACKGROUND: An isolated malleus handle fracture is rare and presents with vague otological symptoms. Diagnosis depends on careful history taking and otoscopic examination. Different treatment options are available. Reconstruction with hydroxyapatite bone cement is a relatively new technique. OBJECTIVE: The aim of this article is to review the current diagnostic work-up and treatment options and to demonstrate our method of treatment with hydroxyapatite bone cement. METHODS: Three cases, repaired with hydroxyapatite bone cement in a tertiary referral otologic center, were retrospectively analyzed. A review of the literature on diagnosis and treatment procedures was performed. RESULTS: One fracture occurred by withdrawing a finger from the external auditory canal and 2 occurred without clear prior trauma. Our 3 cases were successfully repaired with hydroxyapatite bone cement. CONCLUSION: Diagnosis of an isolated malleus handle fracture still depends on careful clinical examination. In addition to pure tone audiometry, both low and higher frequency tympanometry may be useful. High resolution computed tomography with reformatting through the malleus handle is the most accurate imaging modality. Reconstruction with hydroxyapatite bone cement is reliable by restoring the original situation with only minimal manipulation and without additional ossicular interruption.

Validity and Test-Retest Reliability of the Dutch Version of the Chronic Otitis Media Questionnaire 12 (COMQ-12).

OBJECTIVE: To test the validity and test-retest reliability of the Dutch translation of the Chronic Otitis Media Questionnaire 12 (COMQ-12). MATERIALS AND METHODS: Thirty-five healthy individuals with no history of chronic otitis media (COM) received the questionnaire as well as a group of 35 patients with complaints of COM. The healthy participants had to complete the questionnaire twice (control group 1 and control group 2) to estimate the test-retest reliability, and their scores were compared with those of the patients (group 3) to test the validity. RESULTS: The overall COMQ-12 score in control group 1 ranged from 0 to 11, in control group 2 from 0 to 6, and in group 3 from 7 to 46. The mean score in control group 1 was 1.43 [standard deviation (SD) 2.30], 1.34 in control group 2 (SD 2.06), and 27.80 in group 3 (SD 10.51). A comparison of the absolute COMQ-12 scores of the two control groups and the patient group showed a significantly higher COMQ-12 score in patients with COM than in controls. The diagnostic accuracy was investigated, and a COMQ-12 cut-off score of 8 was found to have a near-perfect sensitivity and specificity in distinguishing between the presence and absence of COM. The single-measures intraclass correlation coefficient for absolute agreement (ICCAA) was 0.859 (with a 95% confidence interval from 0.738 to 0.926). This clearly exceeded the ICC threshold for acceptable reliability (ICC≥0.75) and therefore confirmed that there was reasonable test-retest reliability when applying the questionnaire to control subjects. CONCLUSION: The Dutch version of the COMQ-12 has good validity, diagnostic accuracy, and test-retest reliability.