Pembrolizumab: Lack of efficacy : case report.

A retrospective study was conducted on 78 patients with metastatic non-small cell lung cancer, and one patient was described who experienced a lack of efficacy during treatment with pembrolizumab. The patient's disease progressed despite receiving pembrolizumab, and they subsequently received second-line treatment with cisplatin and etoposide. The specific details regarding the patient's age, sex, and treatment outcomes were not provided in the article. [Extracted from the article]