RT Journal A1 Feinstein JA T1 THree’s company JF Archives of Pediatrics & Adolescent Medicine JO Archives of Pediatrics & Adolescent Medicine YR 2009 FD September 7 VO 163 IS 9 SP 782 OP 782 DO 10.1001/archpediatrics.2009.147 UL http://dx.doi.org/10.1001/archpediatrics.2009.147 AB The 11-year-old girl's parents had taken her to the dentist earlier that week for a root canal that had morphed into a relentless oral infection; on reexamination, prominent lymph nodes had prompted her dentist to draw a complete blood cell count in search of an infection diagnosis. He had called the family and directed them to the emergency department as soon as the outpatient laboratory had processed her results. When she presented to the emergency department, her parents believed that she had an overwhelming bacterial infection necessitating intravenous antibiotics. They did not yet know that her age alone placed her in a high-risk category for leukemia.