Synovitis of recent onset. A clinicopathologic study during the first month of disease.

Adolescent Adult Aged Arthritis, Juvenile/complications Arthritis, Rheumatoid/complications,diagnosis,pathology Basement Membrane Blood Platelets Child Complement System Proteins Erythema Nodosum/complications Female Humans Hypersensitivity/complications Leukocyte Count Lupus Erythematosus, Systemic/complications Male Microscopy, Electron Middle Aged Rheumatoid Factor/analysis Synovial Fluid/analysis Synovial Membrane/pathology Synovitis/diagnosis,etiology,pathology gamma-Globulins

gamma-Globulins Complement System Proteins Rheumatoid Factor