How to Pronounce Arnold-Chiari Malformation

Say it like this: AR-nold kee-AH-ree mal-for-MAY-shun. The stress falls on the first syllable of "Arnold" (AR) and the first syllable of "Chiari" (kee-AH). The word "malformation" is stressed on the third syllable (for-MAY-shun).

Many people say "chee-AH-ree" instead of the correct "kee-AH-ree"—the "ch" should sound like a "k," not like in "cheese." Another common mistake is putting the stress on the wrong syllable in "malformation," but remember it's mal-for-MAY-shun, not mal-FOR-ma-shun.

Here's how it divides: Ar-nold Chi-a-ri mal-for-ma-tion. That's 8 syllables total, with the stress landing on the first syllable of both "Arnold" and "Chiari," plus the third syllable of "malformation."

"Malformation" simply means something that didn't form the right way—it's made up of "mal" (meaning bad) and "formation" (meaning how something is shaped or built). In medical terms, it refers to a structural problem that someone is born with.

The condition is named after two doctors—Arnold and Chiari—who studied and described this condition in the 1800s. Medical terms are often named after the physicians who discovered or first documented them.

Yes, it's often shortened to just "Chiari malformation" (kee-AH-ree mal-for-MAY-shun) or the abbreviation "CM." You might also hear people say "Arnold-Chiari" for short, but the full name is the most precise.

"Arnold-Chiari" is the older, historical name for the condition, while "Chiari malformation" is the modern term doctors use today. They refer to the same thing—the older name just includes both doctors' names.

Sure! Here's an example: "She was referred to a neurologist after her diagnosis of Arnold-Chiari Malformation was confirmed." You could also say it more simply: "The patient has a Chiari malformation" in everyday conversation.