Tuesday, April 1, 2008

How much of the word population is suffering from colon cancer


How much of the word population is suffering from colon cancer ?
How much of the word population is suffering from colon cancer and out of how much people are ?
Cancer - 3 Answers
Random Answers, Critics, Comments, Opinions :
1 :
I don't do homework. Google colon cancer and the stats will be there.
2 :
the number is in Millions
3 :
Approximately 148,810 new cases of large bowel cancer are diagnosed each year in the United States, of which 108,070 are colon and the remainder rectal cancers [1] . Annually, approximately 49,960 Americans die of CRC, accounting for approximately 9 percent of all cancer deaths. Incidence — Age is a major risk factor for sporadic CRC. It is a rare diagnosis before the age of 40, the incidence begins to increase significantly between the ages of 40 and 50, and age-specific incidence rates increase in each succeeding decade thereafter (show figure 1) [2] . The lifetime incidence of CRC in patients at average risk is about 5 percent, with 90 percent of cases occurring after age 50. The incidence is higher in patients with specific inherited conditions that predispose them to the development of CRC (see "Risk factors" below). In the United States, incidence rates declined slightly (by 2.4 to 3 percent) between 1998 and 2005 [3] . During the period from 2001 to 2005, the average annual incidence rates per 100,000 population were 61.2 and 44.8 for men and women, respectively. Incidence rates in most other western countries have increased slightly during this period. However, even in the United States, the incidence rates for cancer of the ascending colon have increased, particularly in women [4] . A gradual shift toward right-sided or proximal colon cancers has been observed both in the United States [4-6] and internationally [7,8] . The greatest increase in incidence is in cecal primaries [9,10] . This change in the anatomic distribution of CRCs may be, in part, related to improvements in diagnosis and treatment, and increased screening by flexible sigmoidoscopy with removal of adenomatous polyps in the descending colon, but there also appears to be a true increase in the incidence of ascending colon and cecal cancers [8,11] . Consistent with this hypothesis, five-year survival rates have improved significantly for left and transverse colon cancers, but not for right-sided tumors [12,13] . (See "Screening for colorectal cancer: Strategies in patients at average risk" and see "Approach to the patient with colonic polyps"). Globally, the incidence of CRC varies over 10-fold, with the highest incidence rates in North America, Australia, and northern and western Europe; developing countries have lower rates, particularly Africa and Asia [14] . These geographic differences appear to be attributable to differences in dietary and environmental exposures that are imposed upon a background of genetically determined susceptibility. Mortality — Death rates from CRC have declined progressively since the mid-1980s in the United States and in many other western countries. This improvement in outcome can be attributed, at least in part, to detection of disease at an earlier stage, and more effective treatments, particular adjuvant therapy. (See "Adjuvant therapy for resected colon cancer" and see "Adjuvant therapy for resected rectal cancer"). The United States has one of the lowest mortality rates from CRC, despite having a higher incidence than most countries. Data collected by the Surveillance, Epidemiology, and End Results Reporting Program of the United States National Cancer Institute suggest that 61 percent of all patients treated for colorectal cancer (all stages and sites combined) survive five years [15] . In contrast, the lowest five-year survival rates have been reported by China and Eastern Europe (32 and 30 percent, respectively)





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Posted by Colon Cancer at 4:07 PM