title: A case of lymphoproliferative disease presenting as juvenile rheumatoid arthritis. Diagnosis by synovial fluid examination.
mesh_terms: D000293:Adolescent; D001171:Arthritis, Juvenile / Q000175:diagnosis*; D001707:Biopsy, Needle; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007414:Intestinal Neoplasms; D007719:Knee Joint; D016403:Lymphoma, Large B-Cell, Diffuse / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D009362:Neoplasm Metastasis; D011859:Radiography; D013582:Synovial Fluid / Q000473:pathology