Arnold-Chiari malformation

noun

Ar·​nold-Chi·​ari malformation ˈär-nᵊld-kē-ˈär-ē- How to pronounce Arnold-Chiari malformation (audio)
: a congenital abnormality in which the lower surface of the cerebellum and the lower brain stem protrude into the spinal canal through the foramen magnum
She was born with Arnold-Chiari malformation, a rare and random birth defect that occurs, according to one study, in about 8 of 100,000 people. A deformity of the base of the skull and spine, it can cause chronic pain and loss of balance. Arthur Allen, The Washington Post

Note: Arnold-Chiari malformation often occurs with spina bifida and hydrocephalus. It is classified as a type of Chiari malformation.

Dictionary Entries Near Arnold-Chiari malformation

arnica

Arnold-Chiari malformation

Aromasin

Cite this Entry

“Arnold-Chiari malformation.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Arnold-Chiari%20malformation. Accessed 9 Dec. 2022.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!


The Great British Vocabulary Quiz

  • union jack speech bubble
  • Named after Sir Robert Peel, what are British police called?
Spell It

Hear a word and type it out. How many can you get right?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ