DIFFERENTIAL DIAGNOSIS OF COLLAGEN VASCULAR DISEASES CAUSING POLYARTICULAR ARTHRITIS

​Differential diagnosis of collagen vascular diseases causing polyarticular arthritis are : 
-polymyalgia rheumatic 
-Henoch – schonlein purpura 
-polyarteritis nodosa 
-Wegener granulomatosis 
-mixed connective tissue disease
-scleroderma
-dermatomyositis 
-polymyositis 
-systemic lupus erythematosus