Pulmonary rheumatoid nodules: presentation, methods, diagnosis and progression in reference to 5 cases.

Rheumatoid nodules are a rare manifestation of lung disease associated with rheumatoid arthritis (RA). Their emergence and evolution in the course of the disease is variable. The diagnosis of pulmonary rheumatoid nodules may be suggested if they have a typical appearance in an appropriate clinical context, but an accurate diagnosis cannot be made based only on imaging tests. It is recommended to follow nodules and may be necessary to histologically differentiate them from tumors.