abnormal parasympathetic system morphology abnormal parasympathetic ganglion morphology abnormal parasympathetic ganglia any structural anomaly of the ganglia of the parasympathetic nervous system, including the ciliary, pterygopalatine, submandibular, and otic ganglia in the cranial region and intrinsic (terminal) ganglia associated with target organs in the thorax and abdomen parasympathetic ganglion dysplasia MPheno.ontology MP:0001034