Clinical Characteristics of Breast Cancer Patients in Korea in 2000
- Alternative Author(s)
- Kim, You Sah
- Publication Year
- Hypothesis Breast cancer in Korea continues to rise year by year, and its clinical features will become closer to those now observed in Western countries.
Design Nationwide multicenter survey of the Korean Breast Cancer Society in 2000.
Participants A total of 5401 patients (median age, 46 years) with newly diagnosed breast cancer who underwent surgery at 38 university and 45 surgical training hospitals.
Main Outcome Measures All participating hospitals provided the essential data, including sex, age, the surgical method used, and the American Joint Committee on Cancer classification to determine the clinical characteristics of breast cancer and to compare the results with those of previous surveys conducted in 1996 and 1998 to obtain an epidemiological pattern of breast cancer in Korea.
Results An estimated crude incidence was 23/100 000 patients. Premenopausal women younger than 50 years constituted 61.2%. Of the study population, 71.5%underwent mastectomy; 27.1%, breast-conserving surgery; and 1.4%, other surgical treatments. In all, 52.8% were diagnosed as having stage II disease (American Joint Committee on Cancer classification), and the proportion of early cancer (stages 0 and I) was 31.5%. Comparisons with 1996 and 1998 results indicated that the number of patients with breast cancer is increasing. Mastectomies occurred less frequently and breast-conserving surgery more frequently (P<.001), and we noted an increase in the proportion of early cancer (P<.001). The number of patients with risk factors such as early menarche (P = .003), late menopause (P = .01), a high-fat diet (P = .048), and familial history of breast cancer (P = .046) was also found to have significantly increased.
Conclusions Although our epidemiological survey was limited in terms of its duration, our findings suggest that the incidence of breast cancer in Korea will continue to rise and that the clinical features will become closer to those now observed in Western countries.
The incidence of breast cancer in Korea has continuously increased in recent years, although it is still quite low compared with its incidence in European countries and the United States. According to the cancer registration report issued by the Ministry of Health and Welfare, breast cancer ranked as the third most common cancer in women before 1998, became the most common cancer in 2001, and accounted for about 16.1% of all cancers in Korean women.1 Worldwide, breast cancer is the second most common cancer in female patients and the most common form in developed countries such as the United States and several European countries. The estimate for the year 2000 was close to 1 million new cases per year worldwide, representing an increase of 23.9% from 1990 through 2000 or more than a 2% increase per year.2
The Korean Breast Cancer Society (KBCS) filed the first baseline data on breast cancer after performing a nationwide survey in 1996. Using the same method, we recently attempted to determine the clinical characteristics of breast cancer in Korea to form a consensus for early diagnosis and treatment on an annual basis. The role played by the KBCS in this area is increasingly important, because the incidence of breast cancer is steadily on the increase owing to many factors, including the popularity of the early cancer detection campaign and the rapid westernization of lifestyle (eg, high-fat diet, non-breastfeeding, and late marriage). The purpose of this study was to identify the clinical and epidemiological characteristics of female breast cancer, including age distribution, therapeutic modalities used, disease stage diagnosed when first seen, various risk factors, and the chronological changes compared with the earlier surveys of 1996 and 1998.
- Authorize & License
- Files in This Item:
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.