abnormal spinal cord dorsal horn morphology MA:0001119 MP:0006282 MPheno.ontology Note that the synonym posterior column may refer to either the grey matter dorsal horn or the white matter dorsal column in the spinal cord. Posterior horn may also refer to a region of the brain lateral ventricles. abnormal dorsal horn morphology abnormal posterior column morphology abnormal posterior cornu morphology abnormal posterior gray horn morphology abnormal posterior horn morphology any structural anomaly of the pronounced, dorsolaterally oriented ridge of grey matter in each lateral half of the spinal cord abnormal spinal cord grey matter morphology