Nephroblastoma Wilms tumor HP:0000115 SNOMEDCT_US:302849000 HP:0002667 SNOMEDCT_US:25081006 NCIT:C40407 UMLS:C0027708 The presence of a nephroblastoma, which is a neoplasm of the kidney that primarily affects children. Wilms tumour MSH:D009396 Nephroblastoma is characterized by an abnormal proliferation of the metanephric blastema cells, which are believed to be primitive embryologic cells of the kidney. Clinically, nephroblastoma usually presents as an abdominal mass, and in some cases with abdominal pain, hypertension, hematuria, and fever. Embryonal renal neoplasm