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Johnson, Lisa G.; Madeleine, Margaret M.; Newcomer, Laura M.; Schwartz, Stephen M.; Daling, Janet R.
Cancer, 15 July 2004, Letnik: 101, Številka: 2Journal Article
BACKGROUND Anal cancer is a rare malignancy of the anogenital tract that historically has affected women at a greater rate than men. METHODS The authors analyzed changing trends in incidence rates and 5‐year relative survival percentages for patients with anal cancer. The publicly available data used in the current study were obtained from the Surveillance, Epidemiology, and End Results (SEER) Program, a system of population‐based tumor registries in the United States. RESULTS The incidence of anal cancer was similar for men and women between 1994 and 2000 (2.04 per 100,000 and 2.06 per 100,000, respectively), the most recent period for which data were available, whereas men had lower rates than did women between 1973 and 1979 (1.06 per 100,000, compared with 1.39 per 100,000), the earliest period for which data were available. In addition, recently, black men had higher incidence rates than did other race‐specific and gender‐specific groups (2.71 per 100,000). From the earliest period for which data were available to the most recent period, relative 5‐year survival improved from 59% to 73% among women, was unchanged among men (∼60%), and decreased from 45% to 27% among black men. Eighteen percent of patients who had distant disease were alive at 5 years, compared with 78% of patients who had localized disease. CONCLUSIONS The incidence of anal cancer in the United States increased between 1973 and 2000, particularly among men. There were higher incidence rates and lower survival rates for black men compared with other race‐specific and gender‐specific groups. Later disease stage was inversely associated with the survival rate, indicating that earlier detection may improve the survival of patients with anal cancer. Cancer 2004. © 2004 American Cancer Society. In the United States, the incidence of anal cancer increased between 1973 and 2000, particularly among men. During this same period, the 5‐year relative survival among patients with anal cancer improved for white women, remained constant for white men and black women, and decreased for black men.
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