A Study on the Efficacy of Atezolizumab Combined with Chemotherapy

This study is looking at whether adding atezolizumab (an immunotherapy drug) to standard chemotherapy works better than chemotherapy alone for people with extensive-stage small cell lung cancer — a fast-growing form of lung cancer that has spread widely. **You may be eligible if...** - You are 18 or older - You have been diagnosed with extensive-stage small cell lung cancer - You have not yet received treatment for this diagnosis - You are in good general health (ECOG 0 or 1) - You have at least one measurable tumor on imaging **You may NOT be eligible if...** - You have already received treatment for small cell lung cancer - You have uncontrolled brain metastases requiring steroids - You have serious heart, liver, or kidney problems - You are pregnant or breastfeeding Talk to your doctor to see if this trial is right for you.