has part has part has_part characteristic of has modifier abnormal spleen white pulp morphology absent spleen white pulp MP:0005046 MPheno.ontology failure of spleen white pulp formation absent splenic white pulp absence of the parenchymatous tissue of the spleen that surrounds splenic blood vessels, consists of compact masses of lymphatic cells and is where foreign material removed from the blood is used to initiate an immune reaction that results in the production of antibodies abnormal absent white pulp of spleen