has part has part has_part characteristic of part of has modifier abnormal metencephalon morphology abnormal cerebellum morphology cerebellar dysplasia MPheno.ontology cerebellum dysplasia MP:0000849 any structural anomaly of the part of the metencephalon that lies in the posterior cranial fossa dorsal to the pons and medulla that is concerned with the coordination of movement and learning of motor skills morphology abnormal cerebellum