has part has part has_part characteristic of part of has modifier abnormal hippocampus morphology abnormal hippocampal fornix morphology MP:0003006 MPheno.ontology abnormal hippocampus fornix morphology abnormal fornix hippocampus morphology any structural anomaly of the compact, white, heavily myelinated fiber bundle arising from the Ammon horn of the hippocampus in each cerebral hemisphere and projecting to the hypothalamus and the mammillary body morphology abnormal fornix of brain