Empyema as an Unusual Presentation of Lung Cancer.

Malignant empyema is a rare presentation of lung cancer, marked by the accumulation of frank pus in the pleural space. It can result from various mechanisms, including direct tumor invasion, airway obstruction, immunosuppression, and secondary infections. The clinical presentation is often complex, with symptoms overlapping those of the underlying malignancy and potential complications like sepsis. In the present case, the patient initially presented with chest infection symptoms but, on further investigations, was diagnosed with lung malignancy. Treatment requires a multidisciplinary approach focused on draining the infected fluid, managing infection with antibiotics, and addressing the underlying cancer. Overall, the prognosis of malignant empyema is poor and often fatal.