Epidemiology of preinvasive lesions

Objective: Review of epidemiological data on pre-invasive cervical lesions. Material and methods: Literature review and analysis of data from our Depar tment. Results: Prevalence of data on preinvasive cervical lesions varies widely a nd depends on factors such as differences among countries or regions and am ong ethnic groups, and especially, differences in the type of population st udied. Most important risk factors are: number of sexual partners, smoking, contraceptive use, HPV, age at first intercourse, and screening. Conclusions: In order to reduce risk, pap smears should be performed regula rly, safe sex practices should be recommended, and the use of tobacco produ cts should be avoided.