Objectives Currently, there are limited data available about patients who are diagnosed with lung cancer following an emergency department (ED) visit. This study sought to define the demographics, symptoms profile, staging, and prognosis of this cohort of patients.

Methods We conducted a retrospective study of patients diagnosed with a primary lung malignancy at a lung cancer multidisciplinary meeting between January 2018 and January 2020. Medical records were reviewed to collect data around demographics, presenting symptoms, investigations, admission, cancer stage, and mortality.

Results During the study period, 890 patients were diagnosed with a primary lung malignancy of which 209 (23.5%) presented to ED prompting diagnostic work-up. Of these 209 patients, 89% were hospitalized for a median duration of 6 days. Also, 104 (50%) were female and the average age of the cohort was 70 years. Dyspnea (38%) was the most common presenting symptom. Radiological staging and tissue biopsy were performed as an outpatient procedure in 46% and 41% of patients, respectively. A total of 188 patients had non-small cell lung cancer of whom 68% had ztage IV disease. A total of 53 (25%) patients died within 3 months of ED presentation. These patients were older with more advanced disease compared to patients who were alive at 3 months.

Conclusion Emergent diagnosed patients are a significant proportion of the lung cancer population, presenting with advanced stage disease and increased short-term mortality. Future research should be directed at interventions, such as lung cancer screening program and/or community education, to reduce the need for patients to present to the ED with disabling lung cancer symptoms.