Incidence of Multiple Primary Cancers per Man-Year of Follow Up 20-Year Review from the Ellis Fisehel State Cancer Hospital

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Abstract
The prevalence and sites of simultaneous and the incidence and sites of nonsimultaneous cancers are reported for 1,130 colorectal cancer, 710 mammary cancer, 1,853 cancers of the cervix uteri, 167 chronic leukemia and 458 lymphoma patients. An additional 1,000 consecutive persons with no neoplasm on first examination were also selected. The incidence of new cancers per man-year of risk in the 5 groups with prior cancers compared to the incidence in the control population with no prior cancers and to the age-specific incidence of cancers in Connecticut for the same period shows that the prior cancer at these sites neither increases nor decreases the risk for developing additional neoplasms. Based entirely on the observed age specific incidence of cancers, persons living to extreme age can expect to have multiple cancers with great frequency.

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