Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

  • Listen to MedLink on the go with Audio versions of each article.

Burton line in the lower gum

Burton line indicated by black arrow. (Source: Yang Y, Li S, Wang H, et al. Chronic lead poisoning induced abdominal pain and anemia: a case report and review of the literature. BMC Gastroenterol 2020;20[1]:335. Creative Commons Attribution 4.0 International License,

Associated Disorders

  • Attention deficit hyperactivity disorder
  • Communication disorder
  • Developmental delay
  • Hyperactivity
  • Iron deficiency
  • Iron deficiency anemia
  • Language disorder
  • Learning disabilities
  • Mental retardation
  • Pica