%0 Case Reports %T Primary lung cancer with pulmonary alveolar proteinosis treated with immune checkpoint inhibitor: A case report. %A Horie M %A Nakashima K %A Amano Y %A Shiratsuki Y %A Murakami K %A Isobe T %A Tsubata Y %J Respir Med Case Rep %V 47 %N 0 %D 2024 %M 38235162 暂无%R 10.1016/j.rmcr.2023.101976 %X Primary lung cancer with pulmonary alveolar proteinosis (PAP) is a rare condition. We present a case of a patient with primary lung cancer with PAP treated with an immune checkpoint inhibitor (ICI). A 62-year-old man was diagnosed with autoimmune PAP 8 years prior to current admission. Lung adenocarcinoma was found in his right lung, and platinum-based chemotherapy was administered, followed by atezolizumab. He experienced disease progression after atezolizumab treatment, whereas ICI-induced pneumonia or exacerbation of PAP did not occur. This indicates that ICI may be safely used in patients with primary lung cancer with PAP.