10 Early Symptoms of Lung Cancer
Recurring Lung Infections

As discussed earlier, spreading or growing lung tumors can block the airways. In unsuspecting lung cancer patients, this can cause frequent, unexplained lung infections. If this occurs, your doctor may already have suspicions and will order a cat scan in order to diagnose the underlying issue. If not, you should request a cat scan, since around 25% of x-rays can miss lung cancer.