Lung Cancer Surveillance for Patients With Head and Neck Cancer

Importance Patients with head and neck squamous cell cancer (HNSCC) are at a greater risk of developing pulmonary metastases and/or second primary lung cancer. However, it remains uncertain whether lung screening in these patients, when the initial staging studies are negative, confers any survival benefit. Objective To evaluate long-term cancer survival outcomes in patients with HNSCC undergoing chest radiography vs low-dose computed tomography screening for pulmonary metastasis and/or second primary lung cancer. Design, Setting, and Participants This randomized parallel trial was conducted at a large academic hospital in Canada enrolling treatment-naive patients with de novo HNSCC from September 2015 to December 2022. Eligible patients did not meet the criteria for lung screening established by the US National Comprehensive Cancer Network guidelines. Participants were randomized to chest radiography or low-dose computed tomography screening groups. Data were analyzed from March to August 2024. Intervention or Exposure Comparison of chest radiography vs low-dose computed tomography screening methods. Main Outcomes and Measures Primary outcomes were the lung cancer detection rate measured by comparing the sensitivity and specificity of low-dose computed tomography with chest radiography. Secondary outcomes were overall survival and disease-free survival. Results A total of 137 patients (mean [SD] age, 65.1 [14.1] years; 34 [24.8%] females and 103 [75.2%] males) were included and randomized, 68 (49.6%) to chest radiography and 69 (50.4%) to low-dose computed tomography. Nine of 137 patients (6.5%) developed a second primary lung cancer (6 patients) or lung metastases (3 patients). There were no clinically meaningful differences in survival outcomes between the 2 groups (hazard ratio, 1.2; 95% CI, 0.4-3.9). Chest radiography exhibited a relatively low sensitivity of 66.7% but a specificity of 100%. Low-dose computed tomography demonstrated both high sensitivity (100%) and specificity (100%), for an overall accuracy of 100%. Conclusions and Relevance The findings of this randomized parallel trial indicate that low-dose computed tomography exhibits statistically significant superior sensitivity compared with chest radiography for diagnosing lung metastases and second primary lung cancer. However, there were no important differences in survival rates. These results hold practical significance, offering valuable insights to clinicians who are guiding decisions regarding lung screening protocols. Trial Registration ISRCTN10954990