| Summary points: | A 78-year-old male presents with a 2-month history of progressively increasing generalised weakness and weight loss of 2 kg. This report describes physical examination, medical history, current medications, chest x-ray and CT, CT-guided biopsy and findings, and diagnosis; several images included. The authors discuss primary pulmonary lymphoma, including the types, incidence, presenting symptoms, diagnostic strategies, and treatment options. |