Symptoms Burden in Lung Cancer Patients Undergoing Definitive Chemoradiotherapy: Insights From Electronic Patient-Reported Outcomes

This study is tracking the symptom burden — meaning how much symptoms affect daily life — in people with lung cancer who are undergoing definitive chemoradiotherapy (a combination of chemotherapy and radiation as a main treatment). Participants fill out electronic questionnaires throughout their treatment. **You may be eligible if...** - You have unresectable (inoperable) stage III non-small cell lung cancer, or limited-stage small cell lung cancer - You are 18 or older - You are currently receiving chemoradiotherapy as your primary treatment - You are able and willing to complete electronic questionnaires **You may NOT be eligible if...** - You have severe heart, liver, or kidney problems - You have a psychiatric illness or significant cognitive impairment that would prevent you from completing questionnaires - You have previously had radiation to the chest or middle of the chest Talk to your doctor to see if this trial is right for you.