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.

Uric acid crystals in a human urine sample with a pH of 5

Uric acid crystals in a human urine sample with a pH of 5, detected by an automated urinalysis system. (Source: Doruk Salancı on January 22, 2014. Creative Commons Attribution-Share Alike 3.0 Unported license, creativecommons.org/licenses/by-sa/3.0/deed.en.)

Associated Disorders

  • Choreoathetosis
  • Dystonia
  • Gout
  • Hyperuricemia
  • Intellectual disability
  • Renal stones