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Herniation of cerebellar tonsils. [4] [38] [39] Tonsillar ectopia below the foramen magnum, with greater than 5 mm below as the most commonly cited cutoff value for abnormal position (although this is considered somewhat controversial). [27] [28] [40] [41] Syringomyelia of cervical or cervicothoracic spinal cord can be seen. Sometimes the ...
Also called cerebellar tonsillar ectopia, or tonsillar herniation. Although often congenital, Chiari malformation symptoms can also be induced due to physical head trauma, commonly from raised intracranial pressure secondary to a hematoma, or increased dural strain pulling the brain caudally into the foramen magnum.
7) Tonsillar (downward cerebellar) Uncal herniation In uncal herniation, a common subtype of transtentorial herniation, the innermost part of the temporal lobe , the uncus , can be squeezed so much that it moves towards the tentorium and puts pressure on the brainstem , most notably the midbrain. [ 8 ]
Cerebellar tonsillar ectopia shares many of the same symptoms as CSF leak, [58] but originates either congenitally or from trauma, including whiplash strain to the dura. [69] An alternate method of locating the site of a CSF leak is to use heavily T2-weighted MR myelography. [24]
Cerebellar tonsillar ectopia, aka Chiari malformation, a herniation of the brain through the foramen magnum, which may be congenital or caused by trauma. Ectopic cilia , a hair growing where it isn't supposed to be, commonly an eyelash on an abnormal spot on the eyelid, distichia
Such cerebellar tonsil herniation may occur in up to 70% of children with M-CM. [citation needed] The medical literature suggests that there is a risk of cardiac arrhythmias in early childhood. [8] [9] The cause for this is unknown. In addition, a variety of different congenital cardiac malformations have been reported in a small number of ...
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Cerebellar tonsillar ectopia, or Chiari malformation, is a condition that was previously thought to be congenital but can be induced by trauma, particularly whiplash trauma. [14] Dural strain may be pulling the cerebellum inferiorly, or skull distortions may be pushing the brain inferiorly.