| Summary points: | A 60-year-old male with a history of diabetes mellitus and chronic kidney failure presents with a 15-day history of dyspnoea, cough, malaise, and fever. Physical examination, chest x-ray, tomography, gammagraphy, and histopathology are described; images provided. The authors discuss the importance of considering brown tumours in patients with chronic kidney failure who have secondary or tertiary hyperparathyroidism and an osseous mass. |