Abstract: ObjectiveTo study the etiopathogenisis and clinical manifestations of postnasal drip syndrome. MethodsThe clinic manifestations, treatments and follow-up results of 300 cases in our hospital in recent years were retrospectively analyzed. Postnasal drip is mainly complicated with sinus nasalis and nasopharynx diseases and it often induces chronic cough and various kinds of discomforts in the pharyngeal portion. ResultsAll cases mainly had chronic and various kinds of discomfort in the pharyngeal portion related to sinus nasalis and nasopharynx diseases. Of the total, 243 cases related to diseases in the nasal cavity and the sinus nasalis, of which rhinitis happened in 30, periodic rhinitis in 59, nasosinusitis in 64, nasosinusitis polypus in 77 and tumor in the nasal cavity and the sinus nasalis in 13. Also, 57 cases related to nasopharynx diseases, including 50 cases of inflammatory diseases and 7 cases of neoplastic diseases. The misdiagnosis rate was up to 78.7 percent. After anti-infective treatment, anti-allege, necessary surgeries and radiotherapies, the cough symptoms of 290 cases disappeared and of 10 cases apparently improved. During a 1-2 year follow-up, 8 cases relapsed, but the same treatment measures still had an effect. ConclusionsStrengthening the knowledge of postnasal drip syndrome is an important step to diagnose, reduce the rate of misdiagnosis and guide therapy. In order to reduce the misdiagnosis rate, it is necessary to use the standard check. Also the all-round treatments according to the causes are guarantees for curative effects.

Key words: Etiology, Diagnostics, Postnasal drip syndromes, Treatment outcome