What is the difference between Dandy-Walker complex and Dandy-Walker syndrome?

What is the difference between Dandy-Walker complex and Dandy-Walker syndrome?

Dandy-Walker complex is a group of disorders with similar symptoms. Dandy-Walker syndrome is one of the disorders included in Dandy-Walker complex.

Other disorders included in Dandy-Walker complex are:

• Isolated cerebellar vermis hypoplasia or Dandy-Walker variant: The cerebellar vermis is small or underdeveloped. Children’s brains don’t have other structural issues associated Dandy-Walker syndrome. Many children with this diagnosis develop normally.
• Mega cisterna magna: The posterior fossa is large, but the cerebellum is typical. Mega cisterna magna often doesn’t cause any health issues.
• Posterior fossa arachnoid cyst: A cyst develops on the posterior fossa. It's not common for children to have symptoms due to the presence of a cyst.