STRUCTURAL AND FUNCTIONAL CHANGES IN CONTRALATERAL EAR IN UNILATERAL CSOM
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Keywords
Chronic Suppurative Otitis Media, Contralateral Ear, Tympanic Membrane Retraction, Eustachian Tube Dysfunction, Hearing Loss
Abstract
Background: Chronic Suppurative Otitis Media (CSOM), traditionally considered a unilateral disease, has shown increasing evidence of contralateral ear (CLE) involvement, even in clinically silent presentations. This study aimed to evaluate the structural and functional changes in CLEs among patients with unilateral CSOM.
Objectives: To identify and analyze pathological changes in the CLE in patients with clinically unilateral CSOM.
Methods: This was a cross-sectional observational study conducted over 18 months in a tertiary care center in Karnataka. A total of 120 patients aged 12–50 years with unilateral CSOM were recruited. Detailed otoscopic, radiological, and audiological evaluations (including PTA, tympanometry, OAE, and BERA) were performed on both ears. Data were analyzed using SPSS with statistical significance set at p<0.05.
Results: Among 120 patients, 64.2% showed structural abnormalities in the CLE, with Type II retraction (22.5%) and myringosclerosis (14.2%) being most common. Audiological assessment revealed hearing loss in 26.7% of CLEs, primarily mild to moderate. Tympanometry showed abnormal Type B and C curves in 80.8% of CLEs. Sclerotic changes in mastoid air cells were found in 6.7% of CLEs.
Conclusion: Contralateral ears in unilateral CSOM cases frequently exhibit subclinical pathological changes, reinforcing the need for bilateral assessment in diagnosis and treatment planning.
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A R Raghavendra
Resident, Department of ENT & HNS, Adichunchanagiri Institute of Medical Sciences & Research Institute, Adichunchanagiri University, B.G. Nagara, Nagamangala, Mandya, Karnataka, India. 571448
Kiran M Naik
Professor& HOD, Department of ENT & HNS, Adichunchanagiri Institute of Medical Sciences & Research Institute, Adichunchanagiri University, B.G. Nagara, Nagamangala, Mandya, Karnataka, India. 571448
Aswathy M P
Resident, Department of ENT & HNS, Adichunchanagiri Institute of Medical Sciences & Research Institute, Adichunchanagiri University, B.G. Nagara, Nagamangala, Mandya, Karnataka, India. 571448
R. Abhirami Krishnan
Resident, Department of ENT & HNS, Adichunchanagiri Institute of Medical Sciences & Research Institute, Adichunchanagiri University, B.G. Nagara, Nagamangala, Mandya, Karnataka, India. 571448