title: Epidemiology of breast cancer in Korea: occurrence, high-risk groups, and prevention.
abstract: Breast cancer ranks second or third to uterine cervix cancer and stomach cancer as a cause of death in women, and as a common site of primary cancer. The large difference in its incidence between Westernized and non-Westernized countries is remarkable. There is a linear increase with age that is observed in Western countries, which are high-incidence areas, on the contrary to the inverted V shape curve seen in Asian countries. Epidemiologic studies conducted in Korea have shown that an older age, a family history of breast cancer, early menarche, late menopause, late full-term pregnancy, and never having had a breast-fed child are primary risk factors in the development of breast cancer. The estrogen-augmented-by-progesterone hypothesis explains the roles of these factors to some extent. On the other hand, recent molecular studies have revealed the existence of novel gene environmental interactions. Epidemiological features suggest that the breast cancer incidence rate in Korea will increase, but the age specific curve would not be changed in keeping with what is observed in Western countries. Strategies aimed at controlling breast cancer that include the screening guidelines and the identification of individual predispositions may give us further insights into both the etiology and the prevention of breast cancer.
authors.affiliation: Department of Preventive Medicine, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul 110-799, Korea. kyyoo@plaza.snu.ac.kr
authors.forename: Keun Young
authors.initials: KY
authors.lastname: Yoo
authors.forename: Daehee
authors.initials: D
authors.lastname: Kang
authors.forename: Sue Kyung
authors.initials: SK
authors.lastname: Park
authors.forename: Sook Un
authors.initials: SU
authors.lastname: Kim
authors.forename: Sook Un
authors.initials: SU
authors.lastname: Kim
authors.forename: Aesun
authors.initials: A
authors.lastname: Shin
authors.forename: Hachung
authors.initials: H
authors.lastname: Yoon
authors.forename: Se Hyun
authors.initials: SH
authors.lastname: Ahn
authors.forename: Dong Young
authors.initials: DY
authors.lastname: Noh
authors.forename: Kuk Jin
authors.initials: KJ
authors.lastname: Choe
mesh_terms: D001943:Breast Neoplasms / Q000453:epidemiology* / Q000503:physiopathology / Q000517:prevention & control; D005260:Female; D006801:Humans; D007723:Korea / Q000453:epidemiology; D012307:Risk Factors