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However, examination of the relevant data concerning the supposed obstruction of the eustachian tube by nasopharyngeal carcinomas, choanal polyps and adenoids does not seem to support this cause and effect relationship. Evidence points to other more sophisticated mechanisms which cause negative pressure and an effusion in pathological middle ear conditions. While the hypothesis of a nasopharyngeal mass as the usual obstructive cause of middle ear effusion is hard to maintain, evidence does exist to support the origin of middle ear infection, as seen in acute and secretory otitis media, as being associated, at times, with an ascending infection from the nasopharynx.<\/jats:p>","DOI":"10.1017\/s0022215100126003","type":"journal-article","created":{"date-parts":[[2007,11,30]],"date-time":"2007-11-30T10:16:23Z","timestamp":1196417783000},"page":"95-100","source":"Crossref","is-referenced-by-count":29,"title":["The nasopharynx, eustachian tube and otitis media"],"prefix":"10.1017","volume":"108","author":[{"given":"Jacob","family":"Sad\u00e9","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2007,6,29]]},"reference":[{"key":"S0022215100126003_ref017","first-page":"125","volume-title":"Microbiology and Cytology of Otitis Media with Effusion in Secretory 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