Favoring MM infection | Favoring RA flare | |
---|---|---|
Arthritis | Rare | Frequent |
Tenosynovitis | Rare | Frequent |
Skin findings | Typical swimmer’s granuloma with reddish-purplish discolouration | Rare presence of rheumatoid vasculitis or pyoderma gangraenosum |
Laboratory findings | Elevated inflammatory markers (White blood count, C-reactive protein) | Leukocytosis rare C-reactive protein in severe flares |
Response to glucocorticoid therapy | No improvement | Usually improves |