Immune checkpoint inhibitors in advanced non-small cell lung cancer: A metacentric experience from India.

BACKGROUND

Immune check point inhibitors (ICIs) have changed the treatment paradigm of driver mutation negative non-small cell lung cancer (NSCLC) and they are increasingly incorporated in first-line treatment. Real-world experience of use of these drugs is limited. We aim to evaluate the real-world experience of use of ICIs in patients with advanced NSCLC.

PATIENTS AND METHODS

Medical records of patients with NSCLC treated with ICIs at 4 major academic cancer centers in India between January 2016 and December 2018 were analyzed. The type of ICI taken, response rates, survival, and toxicity profiles were analyzed.

RESULTS

The median age at presentation was 60 years (range: 27-79 years). Nivolumab was the most commonly used ICI drug [80%, n = 70] followed by pembrolizumab [10%, n = 9], and atezolizumab [10%, n = 9]. The median number of ICIs cycles received were 4 (range 2-65). Among the evaluable responses in 74 patients, the objective response rates was 25.6% and clinical benefit rate was 46%. Immune related toxicity occurred in 39.9% of patients but, severe toxicity of Grade III and Grade IV occurred in 5 (5.6%) patients. After a median follow-up time of 8.86 months (95%CI 5.2-11.1) the progression-free survival was 4.73 months (95%CI 3.7-8.9), and overall survival was 11.6 months (95%CI 7.33-NR). ECOG PS at the time of start of ICIs was found to be significant determinant of Progression-free survival and overall survival.

CONCLUSION

Our study demonstrates the feasibility of usage of ICIs in advanced NSCLC in Indian setting with acceptable safety profile and comparable responses with the published studies.