RBFOX3 and neoplasm: NeuN staining of neural tissue in the tumor study group showed following patterns (Table 4): (I) neural tissues with normal mature neurons; (II) dysmorphic neurons with floating-frog neural elements; (III) clusters of dysmorphic neurons; (IV) scattered dysplastic neurons; (V) small cells with enlarged nuclei positive for NeuN in 1 case (N12).