title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 25-1980.
mesh_terms: D001171:Arthritis, Juvenile / Q000175:diagnosis / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007223:Infant; D007719:Knee Joint; D013583:Synovial Membrane / Q000473:pathology