The main finding in Chiari Type I malformation is the Cerebellar Tonsillar Descent, resulting in the synonym of Congenital Tonsillar Ectopia. The measurements of the Clival length, Supraocciput, the tentorial slope and the Tonsillar Descent have been depicted in these following images.
MEASUREMENT OF CLIVAL LENGTH
MEASUREMENT OF THE SLOPE OF TENTORIUM
MEASUREMENT OF THE SUPRAOCCIPUT
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| Associated Syringomyelia in the lower cervical and upper thoracic spinal cord. |
MEASUREMENT OF THE TONSILLAR DESCENT from the McRae's Line
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