| Rheumatoid ulcers |
| Digital lesions, splinter hemorrhages, vasculitis |
| Pyoderma gangrenosum |
| Rheumatoid neutrophilic dermatitis |
| Antiphospholipid syndrome |
| Rheumatoid nodules |
| Amyloidosis |
| Drug reactions |
|
| Due to rheumatoid vasculitis |
| Due to rheumatoid vasculitis (Fig. 13.59) |
| Relatively uncommonly associated with rheumatoid arthritis, but important therapeutically to distinguish them from vasculitic ulcers |
| A relatively recently documented entity |
| Rheumatoid arthritis is a cause |
| Typical nodules on the elbow rarely cause a diagnostic problem, but small nodules (sometimes termed rheumatoid nodulettes) may present at unusual sites, and disorders such as multicentric reticulohistiocytosis may be in the differential of nodules plus arthritis |
| If secondary type, can sometimes be diagnosed in an aspirate of subcutaneous fat |
| Includes urticarial and maculopapular, plus rarer conditions such as penicillamine-induced pemphigus |
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