abnormal sympathetic ganglion morphology abnormal paravertebral ganglion morphology MP:0008317 MPheno.ontology abnormal chain ganglia abnormal chain ganglion abnormal ganglia of sympathetic trunk abnormal paravertebral ganglia abnormal sympathetic chain ganglia any structural anomaly of the groups of postsynaptic neurons located at intervals along the sympatheic trunk, including the superior cervical, middle cervical and stellate (cervicothoracic) ganglia as well as the thoracic, lumbar and sacral ganglia