It's the decent of the cerebral tonsils through the Forman magnum. Aka low lying c.t. , chiari 0 or 1, brain herniation. It can cause many symptoms! And there is no cure, sometimes surgery works but not promising. No doctors really give it credit and say it can't cause a lot of the symptoms people with it complain about, except I find it funny no one with this knows one another but has the same story to tell. So anyways, if you have it and have symptoms you are pretty much f***ed cause no one knows $#¡+ about it. Haha!! Upright health website has great information on it. Check it out!
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The website below has MRI images of cerebellar tonsillar ectopia. http://www.flickr.com/photos/77814749@N00/269706530/in/set-72157594546007849/
developmental cerebellar tonsillar ectopia is a finding that may be associated with exertional headache or headache precipitated by Valsava maneuver or coughing
Cerebellar tonsillar ectopia refers to a brain condition. In this condition, the tonsils near the back of the skull lay low causing herniation.
Cerebellar Tonsillar Ectopia refers to a hernia of the cerebellum in the brain. This condition is also known as a Chiari Malformation. It is corrected through a surgical process to decompress the brain.
at the base of the scull at the back is tonsills that space can become crowded and the tonsills lie low ,
Mild cerebellar tonsillar ectopia refers to a condition where the lower part of the cerebellum, called the tonsils, extends slightly below the normal position through the opening at the base of the skull. This condition is usually considered to be a normal variant and not typically associated with symptoms. It is often an incidental finding on imaging studies done for other reasons.
Ectopia lentis is the medical term for dislocation of the lens of the eye.
It may be a normal finding, depending on the clinical history. It may also represent a congenital disorder or, something worse, like an intracranial mass or edema. The clinical history is important. If the radiologist though the ectopia was an important diagnostic clue, more emphasis would be placed with recommendations.
ton·sil·lar
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In the tonsillar crypt, probably.