Renal Clear Cell Carcinoma Discovered Following Pyothorax: A Case Report

Renal cell carcinoma (RCC) is known for its heterogeneous clinical presentation and its potential for atypical metastatic spread. Thoracic manifestations are usually related to pulmonary or pleural metastases; however, presentation as pyothorax is exceedingly rare. We report the case of a patient in whom clear cell RCC was incidentally discovered during the etiological workup of a pyothorax. This case highlights the diagnostic challenges associated with unusual presentations of RCC and emphasizes the importance of thorough etiological investigation in pleural infections with atypical features.