title: Acute polyarthritis in childhood.
mesh_terms: D000367:Age Factors; D001168:Arthritis / Q000175:diagnosis* / Q000209:etiology; D001171:Arthritis, Juvenile / Q000175:diagnosis; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D004893:Erythema Nodosum / Q000175:diagnosis; D005260:Female; D006801:Humans; D007239:Infections / Q000150:complications; D008180:Lupus Erythematosus, Systemic / Q000175:diagnosis; D008297:Male; D011693:Purpura / Q000175:diagnosis; D012213:Rheumatic Fever / Q000175:diagnosis; D012595:Scleroderma, Systemic / Q000175:diagnosis