article_snippet: But doctors were baffled as CT and MRI scans ruled out all the major condition that lead to PRES.
article_snippet: During a medical examination a week later doctors noticed that A 10-year-old boy were black.
highlights_snippet: (PRES)
  Doctors were baffled as scans ruled out all usual major causes of PRES .
  
highlights_snippet: Doctors teeth were black so (PRES)
  