1资料本文资料系我科1979年至1995年的住院病例，均经病理学检查证实。年龄：本组发病年龄范围1岁～89岁，平均年龄47．2岁。良性肿瘤以20岁～29岁、30岁～39岁、40岁～49岁三组最多见，占所有良性肿瘤的56．2％。上皮良性肿瘤平均发病年龄44．4岁；间叶良性肿瘤平均发病年龄34 1 data of this article Department of our hospital from 1979 to 1995 inpatient cases were confirmed by pathological examination. Age: The incidence of age range of 1 to 89 years old, with an average age of 47.2 years. Benign tumors are most common in the three groups of 20 to 29 years old, 30 to 39 years old, 40 to 49 years old, accounting for 56.2% of all benign tumors. The average age of epithelial benign tumor is 44.4 years old; the average age of benign mesenchymal tumor is 34