Screening for Lung Cancer in India: Expert Opinion Statement

Lung cancer (LC) has the highest rate of disability-adjusted life years (DALY) of all cancers in India. A large majority of patients with LC present with advanced disease, resulting in poor survival rates. Early diagnosis can improve survival outcomes as the patients can be treated with curative intent. The National Lung Screening Trial (NLST), in 53,454 persons at high risk for LC in the US, showed a 20% (95% confidence interval of 6.8-26.7; p = 0.004) relative reduction in LC-specific mortality in the patients screened with low-dose computed tomography (LDCT) compared with chest X-ray. To date, India does not have a formal LC screening (LCS) program. As a panel of experts, we reviewed a synthesis of a targeted literature search on the burden of LC, the current status of diagnosis of LC, barriers to early diagnosis, current referral pathways, LC risk patterns, use of artificial intelligence (AI) and risk calculators for risk assessment, and a multidisciplinary team (MDT) approach to diagnosis LC. We used the existing international LCS guidelines, data from published literature, and clinical experience to depict the characteristics of the population at risk of LC in India-young age (<40 years), smoking, especially the predominance of bidi smoking (an indigenous form of tobacco smoking), exposure to biomass fuel smoke, especially in rural women, and air pollution being the prominent features. LC in India is characterized by a higher rate of driver mutations and adenocarcinomatous histology. Here, we present the expert opinion on risk-based LCS in India and discuss the challenges, facilitators, and research priorities for the effective rollout of LCS in India.