Lymph Cancer More Condition_symptoms If A Person Has Lung Cancer And Lymph Nodes Are Discovered There, Can They Be Cured With Radiation Or Chemo?

If a person has lung cancer and lymph nodes are discovered there, can they be cured with radiation or chemo? - lymph cancer more condition_symptoms

My sister had surgery for cancer of the lungs, removing the mass. Now doctors have found the lymph nodes in the top of their lungs and suggests that radiotherapy or chemotherapy. What are the results? Could it be cured?