PMC3063427_01
(Before the surgery) Midsagittal T2-weighted MRI shows tonsillar herniation of about one centimeter (the arrow) below the hard palateforamen magnum line (the line). Also, no Syrinx and no hydrocephaly or deformity of 4th ventricle is noticed.
JRMS-16-115-g001.jpg
PMC3063427_01_JRMS-16-115-g001.jpg
F1
According to MR imaging, Chiari I malformation was discovered in the patient (Figure 1).
(After the surgery) The occipital craniectomy scar (the arrow) and tonsillar upward migration above hard plate-foramen magnum line (the line), with dilation of foramen magnum and reduction of stenosis were seen. No syrinx, stenosis, and compression were found in the MRI study after the surgery.
JRMS-16-115-g002.jpg
PMC3063427_01_JRMS-16-115-g002.jpg
F2
Follow up MRI was presented in figure 2.