The research team said that about 15 percent of cancer patients worldwide are diagnosed with cancer a second time. But this experienced cancer may be the same or different type.
In the study, researchers analyzed data on the Danish population (7.5 million) from the years 1980-2007 and found about 10 percent of the population has one or more diagnoses of cancer.
The findings indicate cancer patients have a 2.2 times greater risk of developing cancer both times with the same type of cancer, and 1.1-fold increased risk of developing a second cancer jenus different from the first.
Existing risks vary depending on the type of cancer he had. The risk of second cancers of the same type likely to occur in people who have sarcoma (a tumor of the connective tissue is usually on the soft tissue and bone) while the lower likelihood occur in patients with prostate cancer.
While the risk of cancer is different from the first two higher in patients with laryngeal cancer (cancer of the vocal cords, voice box) and lower in people with prostate cancer. The results of this study have been reported on 28 November 2011 in the Canadian Medical Association Journal (CMAJ).
"But the characteristics of individual patients were also involved in creating differences in the risk of cancer is the second time," said Dr. Bojesen Stig from Herlev Hospital, Copenhagen University Hospital, as quoted from HealthDay, Tuesday (11/29/2011).
Furthermore, a colleague of Dr. Bojesen said the risk of cancer for the second time be more specific for certain types of cancer and possibly driven by genetic factors as well as the patient's own lifestyle.
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