Summary of the qualitative features of macrocerebellum in patients with achondroplasia
| Macrocerebellum Imaging Features on Different Imaging Planes | No. of Patients with Imaging Features Present (% Total) (Total  = 23 Patients) |
|---|---|
| Extension of the cerebellar hemispheres inferior to the vermis (midsagittal) | 23 (100.0) |
| Extension of the superomedial portions of the hemispheres above the tentorium cerebelli (coronal) | 16 (69.6) |
| Wrapping of the cerebellar hemispheres around the brainstem (axial) | 20 (87.0) |
| Effacement of the retro- and infravermian subarachnoid CSF spaces (midsagittal) | 22 (95.7) |
| Shortening of the midbrain (midsagittal) | 8 (34.8) |
| Distortion of the tectal plate (midsagittal) | 3 (13.0) |
| Mass effect on the brain stem (midsagittal) | 7 (30.4) |