abnormal spinal cord ventral horn morphology MA:0001134 MP:0005112 MPheno.ontology Note that the synonym anterior column may refer to either the grey matter ventral horn or the white matter ventral column in the spinal cord. The synonym anterior horn may also refer to a region of the brain lateral ventricles. abnormal anterior column morphology abnormal anterior horn morphology abnormal ventral horn morphology any structural anomaly of the ventral grey column of the spinal cord abnormal spinal cord grey matter morphology