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Cerebellar Tonsillar Ectopia is a mimic of Chiari I malformation. It is actually of the type of structural defects that are usually found in the cerebellum. The cerebellum is actually that part of the brain whose main function is to control the balance.
Cerebellar tonsillar ectopia denotes an inferior location of the cerebellar tonsils below the margins of the foramen magnum. It, therefore, encompasses both minor asymptomatic tonsilar ectopia and Chiari I malformations.
The skull puts pressure on and crowds the brain. As a result, the lower part of the cerebellum known as the tonsils are pushed into the upper spinal canal. Chiari malformation type 2 is nearly always associated with a form of spina bifida called myelomeningocele.
This is referred to as low-lying cerebellar tonsils or a Chiari malformation (CM). Other names for this condition are cerebellar tonsillar ectopia or herniated cerebellar tonsils.
Cerebellar Tonsillar Ectopia denotes all cases including congenital and acquired in which the cerebellar tonsils are below the base of the skull. Cerebellar Tonsillar Ectopia includes asymptomatic and symptomatic cases of all degrees of severity.
Tonsillar herniation, also known as tonsillar ectopia, is a condition where the cerebellar tonsils push through the foramen magnum, causing compression of the spinal cord. Learn about its causes, symptoms, diagnosis, and treatment options to better understand this neurological condition.
A diagnosis of a Chiari malformation usually signifies that the cerebellar tonsils protrude below the foramen magnum (often cited as at least 5 millimeters, though this is controversial). However, researchers have determined that the length of tonsil descent in a Chiari malformation does not always correspond to the severity of symptoms or to ...
The cerebellar tonsil (Latin: tonsilla cerebelli) is a rounded lobule on the undersurface of each cerebellar hemisphere, continuous medially with the uvula of the cerebellar vermis and superiorly by the flocculonodular lobe.
Type 1 Chiari malformation (CM-I) has been historically defined by cerebellar tonsillar position (TP) greater than 3–5 mm below the foramen magnum (FM). Often, the radiographic findings are highly variable, which may influence the clinical course and patient outcome.
Clinical characteristics: Chiari I malformation (CIM) is defined by ectopia/herniation of at least one cerebellar tonsil 5 mm or more below the foramen magnum, although this can be seen in a substantial number of asymptomatic individuals. Children may present with a variety of symptoms ranging from headache to severe myelopathy and brainstem ...