Dizziness in adults with chronic otitis media at two otology referral centres in Colombia: a cross-sectional study in a middle-income country.

OBJECTIVE: This study aimed to determine the prevalence of dizziness and its associated factors in patients with COM at two otologic referral centres in a middle-income country. DESIGN: Cross-sectional study. Adults with and without COM diagnosis from two otology-referral centres in Bogotá (Colombia) were included. Dizziness and quality of life were assessed using the "Chronic Suppurative Otitis Media Questionnaire-12" (COMQ-12), and sociodemographic questionnaires were applied. Otoscopic evaluation and audiometric data were collected. STUDY SAMPLE: A total of 231 adults. RESULTS: Of the 231 participants, up to 64.5% (n = 149) reported at least mild inconvenience due to dizziness. Factors associated with dizziness included female sex (aPR: 1.23; 95% CI: 1.04-1.46), chronic suppurative otitis media (aPR: 3.02; 95% CI: 1.21-7.52), and severe tinnitus (aPR: 1.75; 95% CI: 1.24-2.48). An interaction was found between socioeconomic status and educational level, with more frequent reports of dizziness in the middle/high economic status and secondary education (aPR: 3.09; 95% CI: 0.52-18.55; p < 0.001). Differences of 14 points in symptom severity and 18.5 points in the total score of the COMQ-12 were found between the groups with dizziness and without dizziness. CONCLUSIONS: Dizziness was frequent in patients with COM and was associated with severe tinnitus and quality of life deterioration.

[Acute purulent otitis media in children]. / Ostryi gnoinyi srednii otit u detei.

OBJECTIVE: Improving the effectiveness of inpatient care for children with acute purulent otitis media. MATERIAL AND METHODS: 100 children at the age from 0 to 18 years were inspected from January to August 2021. The main diagnostic methods included otoscopy, pharyngoscopy, rhinoscopy. Bacteriological examination of the pus from the ear was done for all patients. RESULTS: Acute purulent otitis media is a common cause of hospitalization in children aged 0 to 3 years. The main causative agents of the disease in toddlers are Staphylococcus aureus and pneumococcus (38%), in preschoolers and primary school children - pyogenic streptococcus and pneumococcus (30%), in high school students - Staphylococcus aureus.

[Bacterial microbiota in exacerbation of chronic purulent otitis media in children]. / Bakterial'naya mikrobiota pri obostrenii khronicheskogo gnoinogo srednego otita u detei.

OBJECTIVE: To study current spectrum of bacterial pathogens that cause exacerbation of chronic suppurative otitis media (CSOM) in children, who live in Moscow region, and to investigate sensitivity of isolated strains to various antibacterial drugs. MATERIAL AND METHODS: The results of microbiome's bacterial cultivation of purulent discharge from tympanic cavities collected from 269 children with CSOM aged from 1.5 to 18 years for the period from 2017 to 2021 yr. were analyzed. The majority of examined subjects (70.6% from 190 children) had CSOM with cholesteatoma. RESULTS: Monoculture was received in 62.5% of examined patients, bacterial associations - in 25.7%, bacterial-fungal associations - in 2.6%, and there was no growth in 9.2% of subjects. Staphylococcus aureus, which was found in 36.1% of children, dominated among agents. Pseudomonas aeruginosa was the second most frequently diagnosed agent, revealed in 12.3% of patients. Candida spp. (7.1%) was prevalent in bacterial-fungal associations. The article presents the results of isolated strains' sensitivity to antibacterial drugs. The high resistance to oxacillin, cefoxitin and antipseudomonal drugs was found among strains collected from children with CSOM and cholesteatoma. CONCLUSION: S. aureus (36.1%) and P. aeruginosa (12.3%) remain the most common causative agents for exacerbation of chronic suppurative otitis media in children. Pathogenic fungi are not isolated separately, and Candida spp. (6.7%) dominates in bacterial-fungal associations. It is generally recognized and confirmed by our research, that topical fluoruquinolones (ciprofloxacin) are the most effective drugs for exacerbation of chronic suppurative otitis media treatment. Systemic antibiotics, of which fluoruquinolones (ciprofloxacin) are the most effective, are recommended in severe exacerbation, severe and destructive forms of chronic suppurative otitis media.

[Partial sequestration of the labyrinth in a child with chronic suppurative otitis media with cholesteatoma]. / Chastichnaya sekvestratsiya labirinta u rebenka s khronicheskim gnoinym srednim otitom s kholesteatomoi.

A clinical case of a 16-year-old child with chronic suppurative otitis media with cholesteatoma complicated by partial labyrinth sequestration is presented. The case describes is a rare disorder. Computed tomography of temporal bones consistent with intraoperative data was decisive in establishing the diagnosis and the surgery extent.

[Choristoma of the middle ear]. / Khoristoma srednego ukha i sostsevidnogo otrostka.

Choristoma is one of the varieties of congenital developmental anomalies, where one or another normal tissue of the body is located in an atypical place for itself. The short literary review of choristoma of middle ear is presented in article. A rare clinical cases of salivary gland choristoma of the middle ear (5-year-old girl with left-sided conductive hearing loss of III degree) and glial choristoma of the mastoid (19-year-old man with signs of chronic suppurative otitis media of the right ear) are described.

Mapping of audiometric analysis with microbiological findings in patients with chronic suppurative otitis media (CSOM): a neglected clinical manifestation.

Otitis media (OM) is an umbrella term for a number of conditions associated with middle ear inflammation. Chronic suppurative otitis media (CSOM), a type of OM, is characterized by long-term middle ear infection with perforated ear drum and otorrhea. The most common outcome associated with it is acquired hearing impairment in infected individuals which ultimately affects their cognitive and scholastic developments. Clinically, CSOM is thought to be a sequel of re-occurring episodes of Acute otitis media (AOM). Pseudomonas aeruginosa and Staphylococcus aureus are found to be the predominant pathogenic isolates in these patients. However, with the emergence of antibiotic resistance amongst these pathogens, the adequate evaluation and treatment of this condition has become more problematic. The disease has also been recognized as one of the neglected tropical clinical manifestations with high prevalence in school-age children, especially in poor or underprivileged countries. Moreover, untreated cases have further worsened the situation by contributing to various life-threatening complications. Thus, effective treatment and surgical strategies, as well as strengthening of hearing care algorithms along with the discovery of novel animal models for advanced clinical research, can jointly help to fight this disease. In this regard, mapping of the audiological analysis with microbiological findings in CSOM patients may help elucidate the frequency that favors growth of specific pathogens. Knowledge about this potential correlation can then support timely detection of the infection, which is perceived as one of the emerging approaches for its management. In addition to these strategies, creating a true sense of awareness among people can also help mitigate this pathological condition by facilitating early identification, prevention, and treatment. This review discusses the incidence, pathogenesis, investigations, complications, and available treatment modalities associated with CSOM.

[Changes in the type and amount of bone collagens in chronic suppurative otitis media]. / Izmenenie tipovogo i kolichestvennogo sootnosheniya kollagenov kostnoi tkani pri khronicheskom gnoinom srednem otite.

OBJECTIVE: Comparative assessment of the collagen-tissue interaction in the bone tissue of the middle ear structures in patients with chronic suppurative otitis media (CSOM). MATERIAL AND METHODS: A prospective study of 42 patients aged 16-60 years with CSOM admitted for reconstructive sanitizing surgery was performed. To study the collagen-tissue interaction, intraoperative samples of the bone tissue of the middle ear were used. A software calculation of vascular-stromal areas and ratios of various types of bone tissue collagen was carried out during histomorphological examination. RESULTS AND DISCUSSION: The quantitative and qualitative parameters of bone tissue collagen obtained intraoperatively in patients with CSOM were studied. The cavities of the middle ear are in the phase of a chronic purulent process, when the bone structures are morphologically disorganized according to the pathological type, and sclerosis with overgrowth of the cellular structure of the mastoid process is considered a favorable outcome for delimiting the focus of inflammation in the pyramid of the temporal bone. CONCLUSIONS: Changes in the processes of collagen remodeling of bone structures contribute to the maintenance of inflammation of the middle ear in all clinical forms of CSOM. Pathological osteogenesis can serve as an indicator of the progressive course of a purulent-destructive process in the cavities of the middle ear, which makes it possible to reliably determine the rate of bone tissue transformation to predict relapse after reconstructive and sanitizing surgery.

[Case of diagnosis and surgical treatment of intracranial cholesteatoma]. / Sluchai diagnostiki i khirurgicheskogo lecheniya intrakranial'noi kholesteatomy.

The article provides a brief overview of the epidemiology of congenital and acquired intracranial cholesteatoma, the theory of its pathogenesis, classification, and clinical features. The most common localization of congenital and acquired intracranial cholesteatoma is described and various surgical approaches are presented that allow total removal of the formation. A clinical case of diagnosis and surgical treatment of acquired intracranial cholesteatoma caused by chronic suppurative otitis media is presented. A clinical example indicates the possibility of a long asymptomatic course of acquired intracranial cholesteatoma. The use of a combined (extradural subtemporal and transmastoid) surgical approach made it possible to completely remove the acquired cholesteatoma of the temporal lobe of the brain in a patient with chronic suppurative otitis media.

Tuberculosis of the middle ear: A systematic review.

OBJECTIVE: Tuberculous otitis media (TOM) is a rare extrapulmonary manifestation of tuberculosis (TB) and remains challenging to diagnose due to non-specific symptoms. This systematic review identifies clinical characteristics, diagnostic evaluation, and outcomes in cases of TOM. METHODS: A comprehensive literature search utilizing the PubMed, CINAHL, Scopus, and Cochrane Library databases was conducted for relevant articles published between 2000 and 2021. Cases involving adult patients with TOM were included. Non-English studies, animal studies, and reviews were excluded. RESULTS: 41 case reports and 7 case series were included, comprising data from 67 patients. The mean age was 40 years (range, 19-87 years) and the majority were female (n = 46, 68.7 %). The mean symptom duration was 12.8 months (range, 0.25-120 months). Common symptoms included otorrhea (n = 60, 89.6 %), HL (n = 58, 86.6 %), otalgia (n = 19, 28.4 %), and FP (n = 18, 26.9 %). Otoscopy revealed tympanic membrane (TM) perforation in 45 patients (67.2 %). Most patients were diagnosed with tissue biopsy (n = 53, 79.1 %). Surgical interventions were performed in 48 patients (71.6 %) and 63 patients (94.0 %) were prescribed anti-TB chemotherapy. Long-term sequelae (e.g., HL, FP, and TM perforation) were noted in 39 patients (58.2 %) at a mean follow-up of 18.8 months (range, 1-120 months). CONCLUSION: TOM should be included in the differential diagnosis of chronic suppurative otitis media. Histopathological examination is a reliable diagnostic method. Early detection and management are recommended for optimizing outcomes. LEVEL OF EVIDENCE: 3b.

[A case of hearing preservation during surgical treatment of distributed fistula labyrinth in a patient with chronic purulent means otitis and cholesteatoma]. / Sluchai sokhraneniya slukha pri khirurgicheskom lechenii rasprostranennoi fistuly labirinta u bol'noi s khronicheskim gnoinym srednim otitom i kholesteatomoi.

The article provides a brief overview of the epidemiology, diagnosis, clinical manifestations and surgical methods of treatment of labyrinthine fistulas (LF) in patients with chronic suppurative otitis media (CSOM) with cholesteatoma. The efficacy of various LF treatment techniques, their complications, and the principles of prevention of cochleovestibular disorders during surgical treatment are described. The prognostic criteria for the deterioration of bone conduction thresholds during LF surgery, which include a large LF size, the opening of the membranous labyrinth, and the extent of damage to the structures of the inner ear, are presented. A clinical case of surgical treatment of widespread LF in CSOM with cholesteatoma is presented, which proves the possibility of preserving the auditory and vestibular functions while observing the stages of sanitation, manipulations on the LF and obliteration of semicircular canals defects with auto tissues. Combined surgery of such a plan must certainly be accompanied by local instillation of solutions of hormonal preparations in case of a deficiency of perilymphatic fluid in the labyrinth and postoperative antibacterial and hormonal therapy.

[Characteristics and differential diagnosis of middle ear cholesteatoma and chronic suppurative otitis media with wideband acoustic immittance].

Objective:Through analysis of the sound energy absorbance of wideband acoustic immittance to provide a basis for differential diagnosis of adult acquired secondary cholesteatoma of the middle ear and patients with chronic suppurative otitis media（CSOM）. Methods:38 cases of cholesteatoma and 40 cases of CSOM admitted to the Department of Otolaryngology, Affiliated Hospital of Xuzhou Medical University from September 2020 to December 2021 were selected as the research group, and 30 cases （60 ears） of normal adults were selected as the control group. A total of 16 frequency points were selected, and the energy absorbance of wideband acoustic immittance was taken as the research parameter. The characteristics of energy absorbance under ambient pressure among the three are compared. Then the ROC in the cholesteatoma group was drawn, and by calculating the AUC, the Cut-off values and the corresponding sensitivity and specificity were found. Results:The energy absorbance in CSOM group at 1100-5700 Hz and the cholesteatoma group at 560-5700 Hz was lower than that in the control group, and the difference in some frequency bands was statistically significant. The energy absorbance in the cholesteatoma group at 226-7100 Hz was lower than that in the CSOM group, and the difference between the two groups in many frequency points was statistically significant. The ROC in the research group was drawn and it was found that the AUC in the 560, 710, 890, and 4500 bands was > 0.5, and in the other bands was > 0.7（P<0.05）. The AUC in the 2800 Hz was the largest （0.78）, the Cut-off value was 0.31, the corresponding sensitivity was 78.38%, specificity was 73.33%. Conclusion:Wideband acoustic immittance can be used as an auxiliary method for the differential diagnosis of adult-acquired secondary cholesteatoma of the middle ear and chronic suppurative otitis media in adults.

Pilot study of dogs with suppurative and non-suppurative Malassezia otitis: A case series.

BACKGROUND: Rarely, Malassezia otitis presents as a painful, erosive otitis with an otic discharge containing Malassezia and neutrophils on cytology. There are no published reports of this type of suppurative Malassezia otitis (SMO). The role of Malassezia hypersensitivity in otitis is still unknown, and no association has been demonstrated with SMO. We compared Malassezia IgE levels, intradermal test and histology changes in SMO dogs with the more conventional Malassezia otitis (MO) presentation. RESULTS: Three dogs (case 1, case 2 and case 3) were diagnosed with SMO, one dog (case 4) was diagnosed with unilateral MO and unilateral SMO, and one dog (case 5) was diagnosed with MO. Only one case (case 4) with SMO/MO had a positive Intradermal Allergy Test (IDAT) and elevated IgE levels for Malassezia. Histopathology findings from SMO revealed: interface dermatitis (case 1 and 3), lymphocytic dermatitis (case 2) and chronic hyperplastic eosinophilic and lymphoplasmacytic dermatitis (case 4). Histopathology findings from MO showed perivascular dermatitis (case 4 and 5). All the cases were treated successfully. CONCLUSIONS: SMO presents with a distinct clinical phenotype in comparison with conventional MO. No consistent aetiology could be isolated. In these clinical cases it is possible that previous treatments could have influenced the results. More research is needed to understand the possible aetiologies and the pathogenesis of SMO.

[Transcanal endoscopic middle ear surgery in children with chronic suppurative otitis media]. / Transkanal'nye endoskopicheskie operatsii na srednem ukhe u detei s khronicheskim gnoinym srednim otitom.

Otomicroscopic surgery remains the gold standard in the surgical treatment of patients with CHS. Endoscopic ear surgery is gaining more and more importance as an adjunct to microsurgery. Recently, thanks to the resolution of the endoscopic technique, endoscopic surgery can be used as an independent method. This article presents the results of endoscopic tympanoplasty, endoscopic removal of the tympanic cholesteatoma, performed on the basis of the otorhinolaryngology department of the Morozov Children's City Clinical Hospital. Research has shown that transcanal endoscopic surgery is an effective alternative to traditional otomicroscopic surgery. Advantage in minimal impact and improved visualization of all quadrants of the tympanic membrane, the anterior tympanomeatal angle of the NSP, and structures of the middle ear.

Unusual manifestation of Koch's disease: Gradenigo-Lannois syndrome.

Gradenigo-Lannois syndrome or petrous apicitis is an uncommon but a morbid complication of otitis media. Traditionally treated by surgery, recent advances in imaging and antibiotics have favoured a more conservative approach. Although pyogenic organisms are the leading aetiological agent, petrous apicitis due to Koch's bacilli is not rare. We report two cases of tubercular petrositis presenting as Gradenigo's syndrome with triad of ear discharge, deep-seated retro-orbital pain and diplopia. The first patient represented a mixed infection with pyogenic organism and tuberculosis, which was successfully treated with antibiotics and antitubercular therapy. The second patient showed an acute presentation of Gradenigo's syndrome with chronic otitis media having contact with an active tuberculosis case and showed dramatic response with antitubercular treatment. Tubercular petrous apicitis must be suspected and diagnosed promptly as only specific treatment will lead to symptomatic resolution and avoid complications.

Probable neurosarcoidosis presenting as acute on chronic otorrhoea: a difficult diagnosis.

An elderly African American woman presented to our clinic following 9 months of right-sided unilateral headache, otorrhoea and progressive hearing loss. Despite treatment with topical and oral antibiotics, her clinical condition worsened, and imaging showed mastoid coalescence with an associated subgaleal abscess. She underwent right mastoidectomy and was discharged 3 days later on broad-spectrum intravenous antibiotics despite negative operative cultures. Six weeks later, she was hospitalised with diplopia secondary to a right lateral rectus palsy. Imaging showed abscess resolution but progressive bony remodelling and enhancement of the lateral extending into anterior skull base. Chest CT demonstrated upper lobe predominant pulmonary micronodules, and mastoid biopsy on revision surgery was notable for non-caseating granulomas. Further extensive work-up could not identify an alternative cause, and a presumptive diagnosis of neurosarcoidosis was made. The patient was initiated on intravenous steroids, experienced symptomatic improvement and was thereafter transitioned to oral steroid taper on discharge.

[Changes in the elemental composition of the temporal bone in patients with chronic suppurative otitis media]. / Izmenenie elementnogo sostava visochnoi kosti u patsientov s khronicheskim gnoinym srednim otitom.

TO STUDY: The effect of the elemental composition of bone tissue on the destruction of the structures of the temporal bone in chronic suppurative otitis media. PATIENTS AND METHODS: The study included 331 patients aged 16-75 years with a verified diagnosis of chronic purulent otitis media, subject to surgical treatment. Depending on the diagnosis and method of surgical treatment, patients are divided into groups: patients with tubotympanic otitis media and epitympanic-antral otitis media after reconstructive sanitation otosurgery in comparison with the control group. The elemental composition of the bone tissue of the cavities of the middle ear obtained intraoperatively was evaluated by x-ray fluorescence spectroscopy. Elements in the bone tissue of the cavities of the middle ear obtained intraoperatively were evaluated by spectrophotometric method. The data are processed by descriptive statistics methods and are presented in the form of a median and a range between quartiles with an estimate of the reliability of the intergroup differences by the Mann-Whitney U-criterion. RESULTS: A comparison of the indicators characterizing the elemental composition of the temporal bone tissue in patients with forms of chronic otitis media demonstrates the progression of the severity of pathological bone remodeling according to various options. In the dynamics of observation in patients with morphological signs of purulent destruction of the structures of the temporal bone, not only the most profound imbalance in the levels of calcium and phosphorus was revealed, but also the limitation of the levels of silicon and sulfur in a progressive and recurrent course at different periods of the disease. CONCLUSION: X-ray fluorescence spectroscopy allows an elemental chemical analysis of bone remodeling according to the pathological type and reliably differentiate purulent diseases of the temporal bone. The results are promising from the point of view of developing new prognostic approaches in otosurgery in the management of patients with chronic purulent otitis media, involving the combined use of morphological research methods with microelement analysis of the temporal bone bone tissue.

Suppurative otitis media in Angola: clinical and demographic features.

OBJECTIVE: To describe the demographics and clinical findings in patients with otorrhoea in Angola. METHODS: A total of 411 patients with otorrhoea presenting in the ear, nose and throat clinic in Luanda and healthcare centres in other Angolan provinces underwent interview and clinical examination. We describe the demographics and clinical characteristics of the patients. RESULTS: The majority (64%) of patients were children <15 years (age ranged from 1 month to 77 years; median age 10.9 years) while 31% were children <5 years. In 83% of the patients, otorrhoea had lasted >14 days at the time of the examination indicating chronic suppurative otitis media (CSOM), which was confirmed with otoscopy in 72% of patients. Acute otitis media occurred in 16% of patients and was more common in children than in adults (22% vs. 10%; P = 0.007). Median duration of otorrhoea was >12 months. Earache (67%), fever (20%), dizziness (17%), nausea and/or vomiting (6%) were the main symptoms. Adult patients reported noticing hearing impairment (HI) more often than the parents of child patients (72% vs. 50%; P < 0.0001). Reported HI correlated with otorrhoea duration (P < 0.0001), presence of earache, dizziness, and measles or meningitis in history. The level of education in the family did not correlate with symptom duration. CONCLUSIONS: Otorrhoea is mainly due to CSOM and affects patients long-term in Angola. Otorrhoea duration is the strongest predictor of HI. Education on OM and its treatment is needed to prevent HI.

OBJECTIF: Décrire les données démographiques et les résultats cliniques chez les patients atteints d'otorrhée en Angola. MÉTHODES: Au total, 411 patients atteints d'otorrhée visitant la clinique ORL à Luanda et dans les centres de soins de santé d'autres provinces angolaises ont subi un entretien et un examen clinique. Nous décrivons les caractéristiques démographiques et cliniques des patients. RÉSULTATS: La majorité (64%) des patients étaient des enfants <15 ans (tranche d'âge de 1 mois à 77 ans; âge médian de 10,9 ans) tandis que 31% étaient des enfants <5 ans. Chez 83% des patients, l'otorrhée avait duré >14 jours au moment de l'examen indiquant une otite moyenne suppurée chronique (OMSC), qui a été confirmée par otoscopie chez 72% des patients. Une otite moyenne aiguë est survenue chez 16% des patients et était plus fréquente chez les enfants que chez les adultes (22% vs 10%; P = 0,007). La durée médiane de l'otorrhée était >12 mois. Les maux d'oreille (67%), la fièvre (20%), les étourdissements (17%), les nausées et/ou les vomissements (6%) étaient les principaux symptômes. Les patients adultes ont rapporté avoir remarqué une déficience auditive (DA) plus souvent que les parents d'enfants patients (72% vs 50%; P < 0,0001). La DA rapportée était en corrélation avec la durée de l'otorrhée (P < 0,0001), la présence de maux d'oreille, d'étourdissements et de rougeole ou de méningite dans les antécédents. Le niveau d'éducation dans la famille n'était pas corrélé à la durée des symptômes. CONCLUSIONS: L'otorrhée est principalement due à l'OMSC et affecte les patients à long terme en Angola. La durée de l'otorrhée est le meilleur prédicteur de la DA. L'éducation sur l'OM et son traitement est nécessaire pour prévenir la DA.

Chronic Suppurative Otitis Media: A Case Report.

BACKGROUND CONTEXT: Chronic Suppurative Otitis Media (CSOM) is a common cause of hearing impairment and disability. CSOM caused by Pseudomonas aeruginosa is usually treated with topical ciprofloxacin and resistance to ciprofloxacin in CSOM isolates has rarely been reported. CASE PRESENTATION: A 24-year-old male patient with CSOM due to p. aeruginosa was reported. CSOM was prolonged for ten years and physician prescribed topical ciprofloxacin drops, pus suctioning and ear pH alteration. The treatment wasn't effective and the patient came back to the clinic with relapse of suppurative otitis media. P. aeruginosa was isolated as the cause of CSOM and the isolate was resistant to ciprofloxacin, aztreonam, imipenem, gentamicin, doripenem, cefepime, levofloxacin, amikacin and susceptible to colistin and ceftazidime. There were two mutations in gyrA and eight mutations were observed in nfxB genes. Finally, tympanomastoidectomy was done. CONCLUSION: Usually topical antibiotics, especially ciprofloxacin, is effective against ear infections but our case was different and the P. aeruginosa isolated from CSOM was resistant to most of the antibiotics. One reason for CSOM recurrence might be surgery failure. The routine and primary treatment for CSOM did not seem sufficient and tympanomastoidectomy is suggested to be the best treatment approach for these patients.

[Risk Factors for Postoperative Recurrence of Chronic Suppurative Otitis Media].

Objective To analyze the risk factors for postoperative recurrence of chronic suppurative otitis media(CSOM) and explore the intervention measures to prevent postoperative recurrence of CSOM. Methods A total of 1066 patients with CSOM who underwent concurrent surgical treatment and achieved clinical cure in our hospital from January 2012 to December 2018 were enrolled.The clinical data and laboratory findings were reviewed by using an electronic medical record system and the patients were followed up for 1 year.The patients were divided into the non-recurrent group and the recurrent group.Chi-square test and multivariate logistic regression were used to compare the factors may contribute to the postoperative recurrence. Results The recurrence rate of CSOM was 6.38%.Multi-drug-resistant(MDR) infection before surgery(χ 2=16.338,P=0.000),aged ≥60 years(χ 2=5.182,P=0.023),frequency of occurrence ≥3 times/year(χ 2=4.388,P=0.036),duration of active period>7 d(χ 2=4.729,P=0.030),repeated upper respiratory tract infection>3 times/year(χ 2=11.913,P=0.001),accompanied by chronic sinusitis(χ 2=11.077,P=0.001),blood glucose>6.11 mmol/L(χ 2=15.327,P=0.000),postoperative serum procalcitonin(PCT)>0.5 µg/L(χ 2=8.337,P=0.004) were the risk factors for postoperative recurrence.The use of snorkel was a protective factor for postoperative recurrence(χ 2=5.308,P=0.021).Multivariate analysis showed that MDR infection(OR=3.373,95%CI:1.825-6.234,P=0.000),repeated upper respiratory tract infection>3 times/year(OR=2.727,95%CI:1.479-5.030,P=0.001),accompanied by chronic sinusitis(OR=2.980,95%CI:1.654-5.369,P=0.000),blood glucose>6.11 mmol/L(OR=3.219,95%CI:1.741-5.953,P=0.000),and postoperative serum PCT>0.5 µg/L(OR=2.085,95%CI:1.106-3.931,P=0.023) were independent risk factors for postoperative recurrence in CSOM patients. Conclusions Effective prevention and control of MDR infection,control of blood sugar,prevention of upper respiratory tract infection,and lowering the recurrence of chronic sinusitis are the main measures to reduce postoperative recurrence of CSOM.Monitoring of the infection marker PCT can help to achieve early intervention.