| Incidental findings | Cushingoid (steroid usage) |
| Signs | Symmetrical deforming polyarthropathy, swelling MCP, PIP, wasting small muscles, ulnar deviation fingers, boutonierre, swan neck, Z thumb, nail fold infarcts, nodules |
| Differential diagnosis | RA, Psoriasis |
| Tests |
FBC - anaemia, hypersplenism
LFTs - methotrexate s/e RF |