<prompt> Answer this question truthfullyWhat is the screening for small cell lung cancer?  <response>: <reason> According to the U.S. Preventive Services Task Force USPSTF, screening for lung cancer by low-dose computed tomography is recommended every year among smokers who are between 55 to 80 years old and who have history of smoke 30 pack-years or more and either continue to smoke or have quit within the past 15 years grade B recommendation. GuidelinesAccording to the clinical practice guideline by the U.S. Preventive Services Task Force USPSTF, screening for lung cancer by low-dose computed tomography LDCT is recommended every year among smokers and former smokers who are between 55 to 80 years old and who have smoked 30 pack-years or more and either continue to smoke or have quit within the past 15 years grade B recommendation. According to the clinical practice guideline issued by the American College of Chest Physicians CHEST in 2013, screening for lung cancer by low-dose CT LDCT is recommended every year among smokers and former smokers who are age 55 to 74 and who have smoked for 30 pack-years or more and either continue to smoke or have quit within the past 15 years. StrategiesLow-dose helical computed tomography: Pros: There is evidence that screening persons aged 55 to 74 years who have cigarette smoking histories of 30 or more pack-years and who, if they are former smokers, have quit within the last 15 years reduce lung cancer mortality by 20 and all-cause mortality by 6.7. Cons: The majority of all positive low-dose helical computed tomography screening exams do not result in a lung cancer diagnosis. False-positive exams may result in unnecessary invasive diagnostic procedures.Chest x-ray andor sputum cytology: Pros: Screening with chest x-ray andor sputum cytology does not reduce mortality from lung cancer in the general population or in ever-smokers. Cons: False positive exams The majority of all positive chest x-ray screening exams do not result in a lung cance r diagnosis. False-positive exams result in unnecessary invasive diagnostic procedures.OverdiagnosisBased on current evidence, the majority of non-small cell lung cancers detected by screening chest x-ray andor sputum cytology appear to represent overdiagnosed cancer. The magnitude of overdiagnosis appears to be between 5 and 25. These cancers result in unnecessary diagnostic procedures and also lead to unnecessary treatment. Harms of diagnostic procedures and treatment occur most frequently among long-term andor heavy smokers because of smoking-associated comorbidities that increase risk propagation. 