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