Lung squamous cell carcinoma presenting as rare clustered cystic lesions: A case report and review of literature

Figure 1 Chest computed tomography, positron emission tomography, and chest radiograph. A: Chest computed tomography (CT) detected a thin-walled cyst (white arrow) in the left upper lobe in 2015 and a large cavity and mass (black arrow) in that same location in 2019; B-E: Chest CT detected multiple clustered cystic lesions in the left lung (B, C representative images) and the right upper lobe (D), and a mass (E) in the right middle lobe (black arrow) and lower lobe (black arrow head); F: Positron emission tomography-CT showed elevated uptake in bilateral lesions in 2019; G: Bedside chest radiograph showed a mass in the right lung and bilateral cystic lesions, which suggested tumor relapse in February 2020.