kidney benign neoplasm nephrogenic adenoma DOID:7334 MONDO:0004191 NCIT:C7413 So-called nephrogenic adenoma is a distinct metaplastic lesion of the urothelium characterized by aggregates of cuboidal or hobnail cells. These cells line thin papillary fronds on the surface or form tubular structures within the lamina propria. UMLS:C0334039 nephrogenic adenoma