Lyme arthritis.
D000293:Adolescent; D001168:Arthritis / Q000150:complications / Q000175:diagnosis*; D001171:Arthritis, Juvenile / Q000175:diagnosis; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D004890:Erythema / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male