abnormal sympathetic system morphology abnormal sympathetic ganglion morphology MP:0001008 MPheno.ontology abnormal sympathetic ganglia morphology any structural anomaly of the ganglia of the sympathetic nervous system including the paravertebral and the prevertebral ganglia, which include the sympathetic chain ganglia, the superior, middle, and inferior cervical ganglia, and the aorticorenal, celiac, and stellate ganglia sympathetic ganglia abnormalities sympathetic ganglion dysplasia