Tumor-Treating Fields Therapy in Preventing Brain Tumors in Participants With Extensive-Stage Small Cell Lung Cancer

This trial studies how well tumor-treating fields therapy works in preventing brain tumors in participants with small cell lung cancer that has spread to other places in the body. Tumor-treating fields therapy involves the use of the NovoTTF-200A which delivers alternating electrical fields, or tumor treating fields, through ceramic discs placed on the head. This electric force may slow and/or reverse tumor growth by disrupting the way cancer cells grow.