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    Assessing the Risk That a Lump in the Lung Is Cancer



    The risk that a new lump in the lung is cancer increases with age.
    Age Risk
    35 15%
    50 40%
    70 70%
    80 >90%


    The larger the lump, the more likely it is cancer.
    Size Risk
    1 inch (2 cm) or less 40%
    More 1-1/2 inches (3 cm) 90%


    The more that a patient smokes, more likely cancer will occur.
    Packs per day Risk over normal
    1 20 times
    2 70 times
    ​
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