The 50-Year Journey of Lung Cancer Screening: A Narrative Review

Abstract

Early diagnosis and treatment are associated with better outcomes in oncology. We reviewed the existing literature using the search terms "low dose computed tomography" and "lung cancer screening" for systematic reviews, metanalyses, and randomized as well as non-randomized clinical trials in PubMed from January 1, 1963 to April 30, 2022. The studies were heterogeneous and included people with different age groups, smoking histories, and other specific risk scores for lung cancer screening. Based on the available evidence, almost all the guidelines recommend screening for lung cancer by annual low dose CT (LDCT) in populations over 50 to 55 years of age, who are either current smokers or have left smoking less than 15 years back with more than 20 to 30 pack-years of smoking. "LDCT screening" can reduce lung cancer mortality if carried out judiciously in countries with adequate resources and infrastructure.

Screening and Early Detection of Lung Cancer: A Comprehensive Systematic Review

“…Overall, the use of LDCT when compared to chest x-ray reduced lung cancer-related deaths by 20%. [20][21][22] PET/CT is an integrated fusion of PET and CT equipment and imaging, which can display accurate anatomical images and tissue metabolic function images. It has been widely used to identify the property and stage of tumors.…”