Introduction: Pneumopericardium, though rare, can lead to severe complications such as cardiac tamponade, particularly in patients with ma-lignancies. This case-based review examines the incidence , management, and outcomes of pneumopericardium in a patient with advanced lung cancer. Case Report: We present a comprehensive literature review and a detailed analysis of a 57-year-old male with metastatic squamous cell carcinoma of the lung, who developed pneumopericardium. The pa-tient's clinical presentation, diagnostic challenges, and management strategies were documented and compared with similar cases. He presented with cough and dyspnea, and imaging revealed pneumopericardi-um, likely due to tumor invasion into the pericardial space. Management involved conservative measures, including antibiotics and close monitoring. A literature review revealed that management strategies for pneumopericardium vary based on hemodynamic stability, ranging from conservative treatments to invasive procedures. Recurrence is common, and survival times post-diagnosis are highly variable. Conclusion: Pneumopericardium in cancer patients requires a tailored management approach, with a multidisciplinary team essential for optimizing patient outcomes. This case underscores the need for heightened awareness and prompt, individualized treatment plans for managing such complex conditions.