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.

Xanthine oxidase catalyzes the conversion of xanthine to uric acid

Xanthine is on the left, and urate is on the right. Overzealous use of allopurinol can lead to xanthine stones. (Source: Wikimedia Commons. Created by J3D3 on February 4, 2015. Creative Commons Attribution-Share Alike 4.0 International license.)

Associated Disorders

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