The outlook depends on the cancer's stage and the patient's overall health. In general, the prognosis is poor, especially if the lung cancer has spread beyond the chest or has invaded lymph nodes between the lungs.
Adenocarcinoma of the lung can only be cured if the entire tumor is removed surgically or destroyed with radiation. However, many lung cancers are diagnosed at a stage when this is not possible. Less than one-fifth of patients survive five years or longer.