Objective:To analyze and conclude the common causes and clinical features of hoarseness in patients at different ages.Methods:The data of 1100 cases of hoarseness in diferent ages were analyzed with laryngofiberscopy.Results:The main 5 causes of hoarseness were neoplasm(767cases

69.72%)

laryngitis(188cases 17.09%)

paralysis of vocal cord(75cases

6.82%)

trauma(30cases

2.73%)

and others(40cases

3.63%).The number of its distribution in 4 age groups was different(P<0.01).Conclusion:The main causes of hoarseness were different in different age groups

carcinoma of larynx and paralysis of vocal cord were for the aged

polyp and nodule of vocal cord

and chronic laryngitis for the youth and adult

and chronic laryngitis、nodule of vocal cord and papillomas for children. This characteritic is benificial for us to diagnose and treat disease correctly.