How is lung cancer indistinguishable from metastases in the lungs?

Patients who carcinoma of the head and neck survive have a high risk of developing lung cancer or lung metastases. Thomas Geurts describes a new model at the genetic level in a fast and practical way to distinguish between these two disorders. In almost half of cases where doctors suspected a metastasis to do to have it proved in reality to be a new lung tumor. Survival in the two groups differed