has part has part has_part characteristic of part of has modifier abnormal spleen white pulp morphology abnormal spleen marginal zone morphology any structural anomaly of the zone between the red and white pulp of the spleen containing numerous macrophages and lymphocytes, and a rich plexus of sinusoids supplied by white pulp arterioles carrying blood-borne antigens Note that there is no consensus in the literature about which compartments constitute the white pulp or the ramifications of the microvasculature. In addition, notable differences exist between humans and rodents. In this ontology, the marginal zone has been included as part of the white pulp. MP:0002362 abnormal splenic marginal zone morphology MPheno.ontology morphology abnormal marginal zone of spleen