PMC3912648_01
(a) An MRI of brain performed during the initial ED visit showing a 1.1 cm downward displacement of the tonsils through the foramen magnum (arrow), (b) An MRI of spine demonstrated a 3 mm x 2.5 cm syrinx at the level of T7-T8 (arrow)
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F1
An MRI of the brain, cervical, and thoracic spine was obtained which revealed a 1.1 cm downward displacement of the cerebellar tonsils through the foramen magnum consistent with a CIM [Figure 1].