Potential side effects which can go along with chest radiation treatments include esophagitis, which is a temporary irritation of the swallowing tube (esophagus). This can develop if a portion of the esophagus is being treated. It presents itself as a heartburn-type feeling or possibly discomfort or pain when the patient swallows.
Again, this is a temporary side effect and responds well to certain medications and subsides once the treatments are completed. It is also possible to develop a mild cough during the treatments; however, that again is usually a temporary side effect and subsides once the treatment is completed. The above side effects do not occur in every patient and can vary in their severity.
The radiation therapy is often given along with the chemotherapy because studies have indicated that, oftentimes, the combination of the two work much better than either one alone. But again, how they are delivered will strongly depend on the stage of the patient's disease.