PMC6396587_01
(a) Axial T2-weighted images at the level of mid-brain shows median cleft, which is seen separating the cerebellar hemispheres and communicating with fourth ventricle, producing the typical bat wing (open umbrella) (solid arrow) appearance. (b) Axial T2-weighted image at the pontomesencephalic junction shows the typical molar tooth appearance (solid arrow) with prominent superior cerebellar peduncles. (c) Sagittal T1-weighted image shows absence of primary fissure and a vermin aplasia superiorly (solid arrow)
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F1
Axial T2-weighted images at the level of mid-brain shows median cleft, which is seen separating the cerebellar hemispheres and communicating with fourth ventricle, producing the typical bat wing (open umbrella) (solid arrow) appearance [Figure 1a]. MRI revealed enlargement of posterior fossa with absence of cerebellar vermis [Figure 1c] and elongated bilateral superior cerebellar peduncle giving molar tooth appearance [Figure 1b].