Abstract
Cases of pulmonary squamous cell carcinoma (SCC) metastases to the nasal region are highly uncommon and frequently manifest with poor prognosis. However, the use of anti-programmed cell death protein 1 (PD-1) inhibitors in pulmonary SCC with nasal metastasis has not been documented. In this study, a case of pulmonary SCC metastasizing to the nose was discussed. Nasal nodules appeared in the patient; initially, these were considered benign lesions. It was determined following a pathological biopsy that the patient had nasal metastases of lung SCC. The lung tumor had decreased after two cycles of standard chemotherapy (paclitaxel + carboplatin); however, the nasal tumor continued to grow. Consider that nasal metastases are not responsive to chemotherapy. A multidisciplinary consultation believed that immunotherapy had potential benefits for metastatic tumors and decided to use a chemotherapy + immunotherapy regimen. The nasal metastatic tumor gradually returned to normal as a result of the combination of standard chemotherapy and immunotherapy (Tislelizumab) from the third cycle onward. After six cycles of combined treatment, the patient began maintenance monotherapy. During treatment, the patient's condition remained stable without progression or distant metastasis. This case highlights the potential of combining anti-PD-1 therapy with standard chemotherapy as an effective salvage strategy for chemotherapy-refractory nasal metastases of pulmonary squamous cell carcinoma, thereby contributing to improved patient survival.