Rheumatoid arthritis
| Incidental findings | Cushingoid |
| +ve 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 |
| Function | |
| Tests |
FBC – anaemia, hypersplenism LFTs – methotrexate s/e RF |
Extensions
- Chest for fibrosis, pleural effusion
- Abdomen for splenomegaly (Felty’s, 2° amyloidosis)
- Peripheral neuropathy, carpal tunnel
Notes
- Other features: subluxation MCP joint, subluxation ulna at carpal joint, scleritis, episcleritis
- 5 causes anaemia: (i) Anaemia chronic disease (ii) NSAID induced GI bleeding (iii) Bone marrow supression due to methotrexate (iv) Associated pernicious anaemia (v) Felty’s
- Rx: Exercise; Physio; NSAIDs; DMARDs (methotrexate, sulphasalazine, chloroquine); corticosteroids; anti-TNF
- Indications etanercept/infliximab: ≥ 3 swollen joints and ≥ 3 painful joints and failure of two previous DMARDs (given on own or together)
- Methotrexate side effects: Hepatic fibrosis, pneumonitis, cytopenia
- Boutonierre deformity: disruption of central slip of extensor tendon
I think D/D of Deforming symmetrical polyarthropathy also includes Jaccoud's arthritis and intests CXR is useful in RA to look for Interstitial changes. infection ( immunosuppresionn related) cardiac size as Hyperetension/valve path etc associated with RA can cause Cardiomegaly and IHD is the Most common cause of death in RA
*****Your notes are fantastic and very comprehensive.