Small cell lung cancer treatment is based on radiotherapy and immunotherapy, and genetic testing is generally not needed or recommended. Targeted therapy, known as molecular targeted therapy, refers to the use of molecularly targeted drugs or other substances to stop the growth and spread of tumor cells. Before using drugs, genetic test can tell which gene target is mutated, and then use the corresponding targeted drugs. Compared with chemotherapy, it belongs to precise treatment, with strong targeting and efficacy. Small cell lung cancer treatment is mainly based on radiotherapy, chemotherapy and immunotherapy, and generally there is no need to perform other genetic tests. Please strictly follow the doctor’s prescription for drug treatment and do not use drugs on your own.