prevertebral ganglia hyperplasia MP:0001010 MPheno.ontology overdevelopment or increased size, usually due to increased cell number, of the sympathetic ganglia located in front of the vertebral column and are associated with the major branches of the abdominal aorta; these include the celiac, aorticorenal, superior and inferior mesenteric ganglia hyperplastic prevertebral ganglia abnormal prevertebral ganglion morphology