Fig. 1
From: Nosological delineation of congenital ocular motor apraxia type Cogan: an observational study
Molar tooth sign on MRI of an infant with Joubert syndrome. a, b Sagittal T1-weighted and c-d axial T2-weighted MRI of patient #1 at age 8 months. a Midsagittal slice shows vermian hypo-/dysplasia (arrows), rostral shifting of the fastigium (star), and deep interpeduncular fossa (arrowhead). b Parasagittal slice displays thickened and horizontalized superior cerebellar peduncles (SCP)(arrow). c-e Axial slices show deep interpeduncular fossa (arrowhead) and elongated SCP (arrows), resulting in “molar tooth sign”, and irregular folia of upper vermis (circle). These MRI features indicate Joubert syndrome