has part has part has_part characteristic of has modifier abnormal metanephric mesenchyme morphology absent metanephric mesenchyme absent nephric mesenchyme absent metanephric blastema absence of the embryonic connective tissue made up of loosely aggregated mesenchymal cells, supported by interlaminar jelly, that gives rise to the developing metanephros; normally, interactions between the ureteric bud and the metanephric mesenchyme lead to the initiation of outgrowth and repetitive branching of the UB that ultimately generates the definitive renal collecting system and induces formation of renal vesicles from the mesenchyme tissue 2011-10-21T02:42:31Z MPheno.ontology MP:0011387 csmith absent metanephric mesoderm abnormal absent metanephric mesenchyme