CT image of rheumatoid nodules in the lung

Axial high resolution computed tomography (HRCT) images of rheumatoid nodules in a 49-year-old woman with long-standing rheumatoid arthritis treated with methotrexate and low-dose prednisolone. The diagnosis was based on the clinical presentation and long-term follow-up. These images show bilateral cavitary and solid nodules. The inner walls of the cavities are irregular, as though studded with nodules. Pulmonary rheumatoid nodules range in size from a few millimeters to several centimeters and may be single or multiple, solid or cavitary. Additionally, the nodules are typically subpleural or adjacent to interlobular septa, as seen in these images.