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Background and Objectives:Postoperative taste and sensory changes are regarded as unusual and minor complications of tonsillectomy and laryngomicrosurgery. This study aimed to identify incidence, cause, and duration of postoperative taste and sensory Subjects and Method:With 20 patients who underwent tonsillectomy and 20 patients who underwent laryngomicro-surgery, we have prospectively studied postoperative taste and sensory changes using questionnaires with regard to symptoms at 1st, 7th , 14th and 28th days after the surgery. The thresholds of sweet, sour, salty and bitter tastes were measured by spatial taste test. Also, we have checked pre-operatively and post-operatively about the serum level of zinc and coper. Results:Five patients (25% ) (15% ) who underwent laryngomicrosurgery sufered from changes in tastes. Four patients (20% ) and 5 patients (25% ) showed the sensory change. Especially, the bitter taste threshold changed in the posterior tongue (p<0.05). Post-operative zinc deficiency was detected on 1 patient. Subjective taste and sensory change disappeared within 28 days. In spatial taste test, the threshold for bitter taste increased on the 1st post-operative day at the posterior tongue, but it returned almost to the preoperative level within 28days. Conclusion:Taste and sensory change after tonsillectomy and la-ural damage, taste and sensory change were transient and disappeared within 28 days. The main cause of transient taste and sensory change seemed to be due to the compression of tongue, and sometimes, to postoperative zinc deficiency. (Korean J Otolaryngol 2007 ;50 :247-51)