has part has part has_part characteristic of part of has modifier abnormal urinary system development abnormal ureteric bud morphology abnormal UB morphology MP:0006032 abnormal mesonephric diverticulum morphology MPheno.ontology any structural anomaly of the epithelial swelling on the metanephric duct that elongates to invade the adjacent metanephric mesenchyme; interactions between the ureteric bud and the metanephric mesenchyme leads 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 morphology abnormal ureteric bud