arnold-chiari deformity
Definition
Noun: - A congenital malformation: The Arnold-Chiari deformity is a structural defect at the base of the skull and cerebellum. In this condition, the lower part of the cerebellum (the cerebellar tonsils) extends into the foramen magnum, the opening at the bottom of the skull where the spinal cord connects.
Usage
- The Arnold-Chiari deformity is often diagnosed using magnetic resonance imaging (MRI).
- Symptoms of Arnold-Chiari deformity can include headaches, neck pain, and problems with balance.
- Treatment for Arnold-Chiari deformity may involve surgery to relieve pressure on the brainstem and spinal cord.
Advanced Usage
- Type I vs. Type II: The term "Arnold-Chiari deformity" is sometimes used interchangeably with Chiari malformation. More precisely, "Arnold-Chiari deformity" often refers specifically to Chiari malformation type II, which is commonly associated with spina bifida. Chiari malformation type I is a less severe, often acquired form.
Variants and Related Words
- Chiari malformation: The more general modern term for this group of structural disorders.
- Arnold-Chiari malformation: A synonym often used in medical literature.
- Cerebellar tonsillar ectopia: A descriptive term for the displacement of the cerebellar tonsils.
Synonyms
- Chiari malformation
- Arnold-Chiari malformation
- Cerebellomedullary malformation syndrome
Related Medical Terms (Not Synonyms)
- Syringomyelia: A condition often associated with Arnold-Chiari deformity where a cyst forms within the spinal cord.
- Hydrocephalus: A buildup of cerebrospinal fluid in the brain, which can be a complication.
- Spina bifida: A neural tube defect frequently present with Arnold-Chiari deformity type II.
Noun
-
deformity in which part of the brain protrudes through the skull
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