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Why Cannot We have an Etiological Classification for the Patients with Granular Myringitis?
Indian Journal of Otolaryngology and Head and Neck Surgery 2017 September
Though granular myringitis (GM) is not a very rare disease it does not have any classification. Its exact etiology is not known. The granulations on tympanic membrane also occur in association with other lesions of external auditory canal (EAC) and middle ear. The aims of this study were to know the etiological factors of GM and classify the disease according to its etiological factors and associated disorders of EAC and middle ear. Data were retrieved from the search of four electronic databases: PubMed, EMBASE, Cochrane Library, and Google scholar. Relevant articles were also sought by a hand search review of reference books. The databases were searched using the key words otitis externa, external otitis, granular myringitis, granular otitis externa and myringitis. Data were extracted using a pre-defined data-extraction form. The following data were recorded (1) etiological and predisposing conditions; (2) pathological features; (3) associated disorders of external and middle ear. The study proposes the etiological classification of GM. It suggests two major groups: primary and secondary. The primary GM is basically idiopathic and these patients do no have evidences of any other types of otitis media and otitis externa. In the secondary GM the cause is obvious and the patients usually have associated otitis media and/or lesions of external ear canal. Author speculates that habit of self ear cleaning/scratching is a specific etiological factor in cases of primary GM but more studies are required to confirm this theory.
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