POST-PACIFIC TRIAL ERA: PATTERNS OF OUTCOMES AND TOXICITIES FROM A SINGLE PRIVATE INSTITUTION IN A DEVELOPING COUNTRY

Background: Despite the twenty-first century, NSCLC remains the leading cause of cancer related deaths in a great variety of nations around the globe. However, the scenario has changed dramatically in the past 5 years. Immunotherapy features have opened a gigantic range of combinations now possible towards a better suited treatment for these patients. And we have seen results as we have never before – even in developing countries. Therefore, the goal of this study was to retrospectively analyze the patterns of outcomes, toxicities and safeness in the post-PACIFIC trial era, reporting results on patients that underwent chemoradiation followed by immunotherapy. Method: We retrospectively collected and analyzed data on patients diagnosed with locally-advanced NSCLC treated in a single private institution in Rio de Janeiro, Brazil, between January 2017 and May 2019. All electronic medical records were accessed in order to obtain demographics, treatment and follow-up pattern data. Patients that received full chemoradiation treatment were included. Patients that did not meet the inclusion criteria were excluded from the study. Results 121 patients were analyzed. 38 did not meet the inclusion criteria, and were excluded. The median age was 73.5y (50-95). 55% (46) were females. 59% (49) patients were smokers, 12% non-smokers. 29% of them did not have that info on their EMR. Adenocarcinoma was the most common histologic subtype (67%). All patients received chemotherapy regimen according to the best suited to patient, being carbo-taxol the most commonly used one (73%). All patients received radiation therapy, and the mostly used scheme was 60Gy in 30 fractions (38.5%). During a medium follow-up of 1.2 years on durvalumab, 8 patients died (9.6%), none of them being a treatment-related death. Most toxicities presented during treatment and follow-up were mucositis (62.5%), cough (52%), cutaneous rash (48.8%). Other minor toxicities were nauseas (22.9%) and hematologic (14.5%). No grade 5 toxicity was reported. Conclusion: This study carries limitations inherent to retrospective analysis. Yet, we found the utmost importance on understanding how our patient population is responding to this new era of NSCLC-oncology. Despite all issues related within a developing nation, we showed that our results are compatible with the current data published. The treatment of locally advanced NSCLC brings exciting results and a big hope for these patients.