Copyright © 2017 American Academy of Pediatrics. From: Extremity Pain American Academy of Pediatrics Textbook of Pediatric Care, 2nd Edition, 2017 Figure Legend: Extremity PainA radiograph of the right knee of a 10-year-old boy who had complained of knee pain of 4 weeks' duration. Group A Streptococcus bacteria were cultured from the osteomyelitic lesion in the distal femoral epiphysis, which is an unusual location for osteomyelitis to occur. Courtesy of Edgar O. Ledbetter, MD, FAAP. Date of download: 11/12/2017 Copyright © 2017 American Academy of Pediatrics. All rights reserved.