Clinical and Imaging Features of Non-Small-Cell Lung Cancer in Young Patients

Non-small-cell lung cancer (NSCLC) in young patients is rare. We retrospectively analyzed the presenting symptoms, clinicopathologic characteristics, and imaging features of 166 young patients with NSCLC. We found that young patients with NSCLC often present with nonspecific symptoms and have advanced disease at diagnosis, which can mimic other pathologies. Targetable genomic alterations are common and may drive imaging features. Background: Non-small-cell lung cancer (NSCLC) in young adult patients is rare, with scarce data available in patients aged 40 years and even less in those aged < 35 years. Our goal was to determine the presenting symptoms, clinicopathologic characteristics, and imaging features of young patients with NSCLC at time of diagnosis and compare them to those of older adults. Patients and Methods: We retrospectively analyzed the medical records and imaging of young patients (<= 40 years old) with NSCLC treated at our institution between 1998 and 2018. Patients < 35 years old were compared to those between 35 and 40 years old. Characteristics of patients <= 40 years old were compared to older patients 40 years) from publicly available data sets. Results: We identified 166 young patients with NSCLC (median age, 36.6 years; range, 18-40 years). Most presented with nonspecific respiratory symptoms and were diagnosed with pneumonia (84/136, 62%). Compared to patients < 35 years old, patients 35-40 years old were more likely to have malignancy detected incidentally (15% vs. 5%, P = .04). Patients < 35 years old were more likely to have central tumors (55% vs. 33%, P = .02) and to have bone (38% vs. 19%, P = .007) and lung (39% vs. 24%, P = .03) metastases. Compared to older patients (> 40 years), young patients were more likely to be never smokers (65.0% vs. 14.7%, P < .001) and to have advanced disease (88% vs. 66%, P < .001). Conclusion: Young patients with NSCLC often present with nonspecific symptoms and have advanced disease at diagnosis, often mimicking other pathologies. Awareness of the clinical presentation and imaging features of NSCLC in young patients may help minimize delays in diagnoses. (C) 2020 Elsevier Inc. All rights reserved.

Automated summary

Research shows that young patients with NSCLC often present with nonspecific symptoms and have advanced disease at diagnosis, which can mimic other pathologies. Being aware of the clinical presentation and imaging features of NSCLC in young patients may help minimize delays in diagnoses.