PMC6243362_01
Sagittal section T2 weighted MR image of the upper cervical spine and posterior cranial fossa demonstrating peg-like cerebellar tonsils positioned 25 mm beyond the foramen magnum.
bjrcr.20160016.g001.jpg
PMC6243362_01_bjrcr.20160016.g001.jpg
fig1
The posterior fossa was mildly underdeveloped but there was no evidence of SHM (Figure 1).
Sagittal section T2 weighted MR image of the upper cervical spine and posterior cranial fossa demonstrating normal tonsillar position and morphology.
bjrcr.20160016.g002.jpg
PMC6243362_01_bjrcr.20160016.g002.jpg
fig2
Surprisingly, a follow-up MRI showed that the CM1 had resolved (Figure 2).