abnormal embryonic/fetal subventricular zone morphology +
abnormal geniculate ganglion morphology +
abnormal glossopharyngeal ganglion morphology +
abnormal neural plate morphology +
abnormal neural tube morphology +
abnormal neuron differentiation +
abnormal neuronal stem cell morphology
abnormal trigeminal ganglion morphology +
abnormal vagus ganglion morphology +
abnormal vestibular ganglion morphology +
abnormal vestibulocochlear ganglion morphology +
any structural anomaly of the group of neuron cell bodies associated with the eighth cranial nerve during embryogenesis; splits in later development to form the cochlear and vestibular ganglia